Answer:
protons and electrons attract each other.
Explanation:
neutron as no charge, proton and electron are exactly the same size but opposite. ( the opposite charge attract)
The protons possess a positive charge so they attract negatively charged electrons.
What is a proton?A proton can be described as a stable subatomic particle, a symbol with a positive charge of +1e elementary charge. Proton's mass is slightly less than that of a neutron but 1836 times the mass of an electron.
Protons and neutrons are jointly referred to as "nucleons" each with masses of approximately one atomic mass unit. More than one proton can be present in the nucleus of an atom. They give the attractive electrostatic central force which holds the atomic electrons.
The number of protons in the nucleus is referred to as the atomic number and is represented by the symbol Z. Since each element in the modern periodic table has a unique number of protons, its own unique atomic number, determines the chemical characteristics of the element.
As the neutrons are neutral do not carry any charge so the protons do not attract neutrons.
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explain the periodic table law of element
Elements of the periodic table are arranged in order of increasing atomic number. The periodic law states “When elements are arranged in order of increasing atomic number, there is a periodic repetition of their chemical and physical properties.”
when using vacuum filtration which type of tubing is best?
Answer:
The filter flask and the vacuum trap consist of heavy-walled glassware. You should use thick-walled tubings as well. Normal tubing that you use as water hoses will collapse under vacuum.
For vacuum filtration, thick walled tubings are best as they can withstand the pressure which is applied during filtration.
What is vacuum filtration?It is a filtration technique which works faster .This is because water is suck out the air in the vacuum flask and Buchner funnel by flowing it through the aspirator.
Filter at the bottom separates the solids from the liquids.Solid residue at top of funnel can be easily dried. The filtration takes place effeciently in presence of vacuum .
There is a rubber conical seal which ensures that the apparatus is hermetically closed,maintains vacuum in apparatus and avoids physical points of stresses.
Vacuum filtration is faster than gravity filtration and is more efficient leading to purer liquid. It is of much importance in crystallization.
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How many moles of carbon atoms are there in
5g of carbon?
Answer:
12 atoms of carbon
Explanation:
(6.023X10^23)/12 atoms of Carbon.
There are 0.42 moles of carbon atoms in 5g of carbon.
HOW TO CALCULATE NUMBER OF MOLES:The number of moles in a substance can be calculated by dividing the mass of the substance by its molar mass. That is;no. of moles = mass (g) ÷ molar mass (g/mol)
According to this question, the mass of carbon is 5g. The molar mass of carbon is 12g/mol.No. of moles = 5g ÷ 12g/mol
No. of moles = 0.42moles
Therefore, there are 0.42 moles of carbon atoms in 5g of carbon.
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How is the bond between carbon and hydrogen in methane DIFFERENT from the bond
between potassium and hydrogen in potassium hydride?
Answer:
How is the bond between carbon and hydrogen in methane DIFFERENT from the bond
Explanation:
1. Why do plant cells have a cell wall in addition to a cell membrane?
2. Think about the function of chloroplasts. Would you expect to find
more chloroplast in the cells of leaves or the roots of a plant?
3.What two cell structures do protists have that bacteria do not?
4. Do all microbes cause disease? Explain
Answer:
Plant cells have a cell wall and chloroplasts; animal cells do not have either of these structures.
Explanation:
A major difference between a plant cell and an animal cell is presence of chloroplasts in plant cells. Another key difference between plant and animal cells is the presence of a cell wall in plant cells. Both structures are absent in an animal cells.
The cell wall surrounds the plasma membrane of plant cells. This helps to provide the required tensile strength and protection against mechanical and osmotic stress.
Cell walls also help plants to maintain shape and rigidity.
Answer:
1) Plant cells have a cell wall to strengthen the cell
2) Chloroplasts are the site of photosynthesis (turning light energy in sugar) so there would eb a lot more in the leaves that get sunlight than the roots which are underground and receive no sunlight
3) Mitochondria and nucleus
4) No. Some microorganisms are useful to humans, such as the bacteria that create yoghurt, or fungi such as penicillin which are antibiotics, which help us fight bacterial infections
Which option would be an appropriate model of nuclear fusion?
A adding a drop of water to a glass of water
B sewing one piece of fabric to another
C mashing two marshmallows together
D putting a puzzle together
Mashing two marshmallows together can be an appropriate model to explain nuclear fusion.
Nuclear fusion is the reaction that occurs when two or more light elements combine to form heavier elements with the release of energy.
Nuclear fusion reactions occur mainly in the production of stars and the main-sequence star, The Sun by the fusion of hydrogen nuclei into helium.
Therefore,The following cannot be a model of Nuclear fusion, because they do not follow the basic concept of nuclear fusion which two light nuclei react to form a single heavy nuclei.
Adding a drop of water to a glass of waterSewing one piece of fabric to anotherPutting a puzzle togetherMarshing two marshmallows together can be a good model to explain nuclear fusion because it follows the basic concept of nuclear fusion
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Answer:
mashing two marshmallows together
Explanation:
i've taken the test
significant figures and scientific notation practice.
Answer:
11: 4
12: 3
13: 1
17: 3.000060
18: 5.0 x 10^2
19: 5.0 x 10^6
Explanation:
11: digits between 1&9 are always signifigant even if there are zeros between them
13: Zeros after the decimal do not count unless they represent an exact measurement
18: The decimal point moves forward 2 units so 10^2
Why do atoms exchange or share electrons during bonding?
to obtain a full outer electron shell
to attract an ion with the opposite charge
to become neutral
to have eight inner level electrons
Answer:
to obtain a full outer shell
Explanation:
The atoms of some elements share electrons because this gives them a full valence shell. ... If atoms can't achieve a full outer shell by transferring electrons, they resort to sharing. In this way, each atom can count the shared electrons as part of its own valence shell. This sharing of electrons is covalent bonding.
Atoms generally exchange or share electrons during bonding because they want to obtain a full outer electron shell. Thus, the correct option for this question is A.
What is Chemical bonding?Chemical bonding may be defined as a type of interaction that is significantly accomplished through the association of atoms into molecules, ions, crystals, and other stable species that make up familiar substances.
According to the context of this question, the atoms of some elements typically transfer their electrons to the other elements in order to achieve a fully filled outermost shell.
If they do not have a tendency of transferring, they follow a different mechanism of sharing their electrons. The sharing of electrons gives rise to the formation of covalent bonding.
Therefore, atoms generally exchange or share electrons during bonding because they want to obtain a full outer electron shell. Thus, the correct option for this question is A.
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what happens when potassium reacts with fluorine to produce potassium fluoride
Answer:
In order to obtain eight valence electrons (an octet), the potassium atom will transfer its single valence electron to the fluorine atom.
In what ways are the electronic structures of the group 14 (4A) elements similar? In what ways are they different?
Elements in the same group have the same number of outermost electrons.
What is electronic structure?Electronic structure refers to the arrangement of electrons in the atom. We know that elements in the same group have the same number of outermost electrons.
However, as we come down the group, the inner shells of the elements in group 14 become bigger and the outermost shells are now found at higher energy levels such as n=4 or 5.
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Someone pls help me I will make you brain
Answer:
2 and 3 is the answer because Methane is emitted from a variety of anthropogenic (human-influenced) and natural sources. Anthropogenic emission sources include landfills, oil and natural gas systems, agricultural activities, coal mining, stationary and mobile combustion, wastewater treatment, and certain industrial processes
the kinetic theory of matter explores the spatial relationship between the particles of solids liquids and gases , which of the following processes causes the distance between particles to increase the most?
A-Melting
B-Freezing
C-Sublimation
D-condensation
Studying the brightness of a star can help scientist determine what part of the life-cycle a star is in.
Answer:
yes
Explanation:
3. How does
photosynthesis affect
your daily life?
Answer:
to create oxygen and energy in the form of sugar
Explanation:
photosynthesis is the process by which plants use sunlight, water, and carbon dioxide
7. How do the test variables (independent variables) and outcome variables (dependent variables) in an
experiment compare?
The test variable (independent variable) and outcome variable (dependent variable) have no affect
BL A. on each other.
The test variable (independent variable) controls the outcome variable (dependent variable).
BB
The outcome variable (dependent variable) controls the test variable (independent variable).
B.C.
The test variables (independent variables) and outcome variables (dependent variables) are the same
Bi D. things
Answer:
The two main variables in an experiment are the independent and dependent variable. An independent variable is the variable that is changed or controlled in a scientific experiment to test the effects on the dependent variable. A dependent variable is the variable being tested and measured in a scientific experiment.
Explanation:
Hope this helps...
Chemical Formula:
4Ca(OH)2
In the chemical formula above, how many different types of elements are present in a molecule of this formula?
Answer:
They are just two....Ca and OH
Sabrías citar al menos tres elementos gaseosos en estado natural
Answer:
a change in the level of consumer income
Explanation:
When a substance is soluble it:
A. can dissolve any amount into the liquid.
B. can dissolve only a specific amount into the liquid, determined by its solubility.
C. can dissolve only a specific amount into the liquid, determined by the liquid's solvent point.
D. can dissolve any amount into the liquid, as long as the liquid is being heated.
When a substance is soluble it can dissolve only a specific amount into the liquid, determined by its solubility. Hence, option B is correct.
What is the solute?A solute is something being dissolved, a solvent is a thing dissolving the item, and the solution is the mixture of the two items.
Solubility is a term used to describe how readily a substance can be dissolved in a solvent to form a solution. Thus, a substance is said to be soluble if it dissolves completely in a solvent and insoluble if it doesn't dissolve or only dissolves partially.
Hence, when a substance is soluble it can dissolve only a specific amount into the liquid, determined by its solubility.
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2. In which sentence is the term heat used correctly?
A. Heat moves from a cold cup to warm tea.
B. A thermometer measures the heat in an object.
C. The heat from the hot cup warms my hands.
D. Warm soup contains more heat than cold soup does.
Answer:
c. The heat from the hot cup warms my hands
Is this equation balanced? Explain why the equation S+3O2 → SO3 is balanced or is not balanced. Use four different words from the word bank to earn (4 points).
We can check if the equation is balanced by comparing the number of atoms of each element on the reactant and product sides. The reaction is only balanced if the number of atoms of each element is equal.
S + 3O₂ → SO₃
Reactant Product
S 1 1
O 6 3
∴ the equation is UNBALANCED since the number of atoms of oxygen on the reactant side is greater than that of the product.The balanced equation would be 2 S + 3O₂ → 2SO₃
Reactant Product
S 2 2
O 6 6
what would happen to dietary protein if hcl were not being produced in sufficient quantities?
Dietary protein will not be digested if Hcl were not being produced in sufficient quantities.
In the stomach, there are some glands found on the stomach lining that helps to release hydrochloric acid (HCl). Their major role is to dissolve food and produce an acidic medium.
The acidic media promotes and improves the conversion of pepsinogen to pepsin. Pepsin acts as an enzyme that supports protein digestion.
Protein digestion requires a pH of around 1.8 which can be achieved by the secretion of HCl.
As a result, if HCI is not released in the stomach in sufficient quantities, pepsin will not be activated and it would have a detrimental impact on protein digestion.
Therefore, we can conclude that dietary protein will not be digested if Hcl were not being produced in sufficient quantities.
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during the process of nuclear decay what form of energy is released?
Answer:
Mostly Kinetic
Explanation:
What two factors must be held constant for density to be a constant ratio?
The two factors which must be held constant for density to be a constant ratio are: Mass and Volume
As we know, the density of a material is simply defined as the ratio of mass to volume.
In essence, Density = Mass/VolumeConsequently, To obtain a constant ratio for density, the mass and volume of the material in discuss must be kept constant.
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Sam wants to know how fast his brother can run. He knows the time it took for his brother to run
from the starting line to the finish line. What else does he need to know in order to calculate the
speed of his brother?
O He needs to know what time his brother ate lunch.
O He needs to know the direction his brother ran.
O He needs to know the distance from the starting line to the finish line.
Describe how the particles in a substance are represented in particle theory.
Answer:
The particle theory of matter is a model that describes the arrangement and movement of particles in a substance. The model is used to explain the physical properties of solids, liquids and gases. Particle arrangement and movement
Explanation:
If 1000 ml of linseed oil has a mass of 992 g, calculate the density of linseed oil.
Answer:
0.99 g/mLExplanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\[/tex]
From the question
mass = 992 g
volume = 1000 mL
We have
[tex]density = \frac{992}{1000} \\ = 0.992[/tex]
We have the final answer as
0.99 g/mLHope this helps you
Which statement describes what a thermos does?
A. A thermos makes things warmer
B. A thermos stops heat transfer
C. A thermos makes things cooler
D. A thermos slows heat transfer
A thermos slows down the process of heat transfer as it minimizes the process of conduction and convection.
What is conduction?
Conduction is defined as a process as a means of which heat is transferred from the hotter end of the body to it's cooler end.Heat flows spontaneously from a body which is hot to a body which is cold.
In the process of conduction,heat flow is within the body and through itself.In solids the conduction of heat is due to the vibrations and collisions of molecules while in liquids and gases it is due to the random motion of the molecules ,
When conduction takes place, heat is usually transferred from one molecule to another as they are in direct contact with each other.There are 2 types of conduction:1) steady state conduction 2) transient conduction.According to the type of energy conduction is of three types:
1) heat conduction
2) electrical conduction
3)sound conduction
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why is it important to select a good stationary phase
Selectivity is relatively easy to alter, with mobile phase composition and stationary phase being the primary means of adjustment. The hydrophobicity, polarity and nature of the chosen stationary phase all play a crucial role in analyte interaction and directly affect the selectivity of a separation.
In chromatography, it is important to select a good stationary phase so as to ensure proper separation of components.
What is chromatography?Chromatography is a separation technique which is generally used for separating substances based on their solubilities. The technique makes use of two phases the mobile phase and the stationary phase.
The components are separated from each other based on their solubility in the mobile phase. Component which is least soluble does not travel along the mobile phase while component which is highly soluble travels with the mobile phase.
The difference in the solubility of the components is measured with the reference to the solvent front and is expressed in terms of Rf value.Chromatography finds application in forensics, separation of organic compounds,etc.
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Which describes an atom that has fewer neutrons than protons and more electrons than protons?
A. negative compound
B. positive compound
C. positive ion
D. negative ion
PLEASE QUICK I NEED HELP!!!!! :(
List these drinks in order of kinetic energy, starting with the drink whose particles have the highest kinetic energy.
hot chocolate, water, juice, milk
hot chocolate, juice, milk, water
water, milk, juice, hot chocolate
water, hot chocolate, juice, milk
Water
Milk
Juice
Hot choclate
Answer: The answer is B). Hot Chocolate, Juice, Milk, Water.
Explanation: For the second row, I put the temperature (in °C) in the descending order that looks like this: 50°C, 40°C, 35°C, 15°C.
I hope that my answer is very helpful to your own question about listing these drinks in descending order by starting with the drink whose particles have the highest kinetic energy, please mark me as Brainliest and have a great P.A. Day and weekend! :D
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Jason Ta,
The ambitious of Brainly and the role of The TDSB and WHCI Student of the high school.