11.Three atoms of element X react with an element(s) Y from group VIA. What
would be the chemical formula between X and Y.
Answers
Element “X” belongs to family 2A, meaning it is part of the family that includes elements such as Be and Mg. These elements will all have 2 valence electrons and can be represented by the following Lewis diagram:
Element “Y” belongs to family 5A, meaning it is part of the family of elements that includes elements such as N and P. These elements will all have 5 valence electrons and can be represented by the following Lewis diagram:
Atoms from these two families will usually react with each other by losing or gaining valence electrons to create stable ions (an ion is what we call an atom/particle that has a charge). These stable ions form by the atoms either losing or gaining electrons until they have the same number of valence electrons as the nearest Noble Gas. This means that each ion will have a full valence shell (usually consisting of 8 electrons), often referred to as a “stable octet”, and this process of creating stable ions is often called the “octet rule”.
Atoms with fewer that 4 valence electrons will normally have a weak hold on their valence electrons and will tend to lose their valence electrons when forming ions.
Atoms with 4 or more valence electrons will normally have a strong hold on their valence electrons and will tend to gain electrons when forming ions.
The charge on the ion arises from the fact that, initially, the atom is electrically neutral because it has the same number of electrons (negative charges) as protons (positive charges). By losing electrons, the atom will end up with more protons (positive charges) than electrons (negative charges) and will form an ion with an overall positive charge. By gaining electrons, the atom will end up with more negative electrons than positive protons becoming an ion with an overall negative charge.
So, an atom of element “X”, with only 2 valence electrons, must lose its 2 valence electrons (which will be gained by element “Y”) to form a stable ion with a 2+ charge (losing two electrons leaves the ion with 2 more positive charges (protons) than negative charges, so a net charge of 2+).
An atom of element “Y”, with 5 valence electrons, must gain 3 electrons (from element “X”) to form a stable ion with a 3- charge (gains 3 extra negative charges).
We can show this process using Lewis diagrams:
From this set of diagrams you can see that in order to create stable ions of both “X” and “Y” we need these atoms to react with each other in a 3:2 ratio (we need 3 atoms of X for every 2 atoms of Y). This means that the resulting chemical formula of the compound will be:
Now, we will look at a short cut that can help you figure this out without having to draw Lewis diagrams.
Compounds are electrically neutral, meaning they must contain equal numbers of positive and negative charges. For compounds consisting of oppositely charged ions, this means that the total charge of the negative ions must be equal to the total charge of the positive ions. In other words the ions must combine in a ratio that makes their charges add to zero.
If we look at the compound we just made, X3Y2, we can confirm this:
So, now you can you predict the formula of simple ionic compounds:
from the family of elements, determine the number of valence electrons each element has
determine the charge of the ions that each atom will form using the octet rule (or look on the periodic table, most will tell you the stable ionic charges that each element can form)
determine the ratio of positive ions to negative ions that results in an overall charge of zero
Example,
What is the formula of a compound produced when an element from family 3A combines with an element from family 7A?
Related Questions
What type of bond would be formed between hypothetical elements X and Y in the the compound XY based on their electronegativity difference?
A. Nonpolar covalent because the difference in electronegativity is greater than 0.4, but less than 1.7
B. Nonpolar covalent because the difference in electronegativity is greater than 1.7
C. Polar covalent because the difference in electronegativity is greater than 0.4, but
less than 1.7
D. lonic because the difference in electronegativity is greater than 0.4, but less than
1.7
Answers
The bond is polar covalent because the difference in electronegativity is greater than 0.4, but less than 1.7.
Electronegativity refers to the ability of an atom in a compound to attract the electrons of the bond towards itself. It is a periodic trend that increases across the period but decreases down the group.
The electronegativity difference between the two atoms as shown in the question is 1.55. This means that the bond is polar covalent because the difference in electronegativity is greater than 0.4, but less than 1.7.
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EASY QUESTION (PLEASE HELP THE INTERNET ISN'T SUCH A BIG HELP RIGHT NOW)
Things microscopes have helped scientists discover about cells.
(No links plz)
Answers
Answer:
Adding on to the answer said before, microscopes are pretty much one of the most significant tools used in Biology. It helped discover organelles, and smaller stuff like DNA, and prominently allowed Scientists to discover Bacteria and Archaea, the prokaryotic cells that contribute a big role in the functioning of soil, which is essential for our ecosystem.
How does collision theory relate temperature to the rate of a reaction?
Answers
Answer:
Explanation:
The collision theory explains why reactions occur between atoms, ions, and molecules. With the increase in temperature, there is an increase in the number of collisions. Increasing the concentration of a reactant increases the frequency of collisions between reactants and will, therefore, increase the reaction rate.
How can air pollution affect plants
A. Air pollution can block sun light from reaching plants
B. Air pollution can affect the water plants need.
C. Air pollution absorbs carbon dioxide.
D. Air pollution can change normal temperatures of a region.
Answers
Answer:
A
Explanation:
B) pollution doesn't affect water
C) Air pollution makes carbon dioxide
D) air pollution does not affect temperature
How long does it take far Uranus to complete one revolution (orbit) around the sun?
Answers
What was the effect of increasing the water's mass?
Answers
-water has a high capacity
Select the atom that will attract the electron pair (:) more strongly (the atom with the greater electronegativity)
HELP PLEASE
Answers
a) C8H18
Name the organic compound
Answers
Answer:
Explanation:
Octane
Octane is a straight chain alkane composed of 8 carbon atoms.
. What were the factors responsible for the change of dead organic matter into fossil fuels?
Answers
Mark Brainliest please
Which physical adaptation increases an organism's chances of finding a suitable habitat?
the long legs of wading birds
the croak of frogs
the quills of a porcupine
the venom of snakes
Answers
The physical adaptation among the option that increases an organisms
chances of finding a suitable habitat is the long legs of wading birds
An adaptation is a characteristic that helps an animal survive in its habitat.
Any animal who successfully survives on land or water must have behavioural
and physical trait or attributes or adaptation that assist it to achieve those
goals.
This physical adaptation might be body growth, body covering during
weather change, body functioning or even body parts.
The physical adaptation among the option that increases an organisms
chances of finding a suitable habitat is the long legs of wading birds.
The long legs of wading birds assist them to find a suitable habitat. The long
legs can move through shallow water without wetting their feathers.
There long leg give them better eye sight to search for food and suitable
habitats.
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2. Which of the following statements is true about covalent bonding?
A It is the attraction of atoms for an electron
B it involves the losing and gaining of electrons
Cit involves the sharing of electrons
Dit involves the moving of electrons between energy levels
Answers
Answer:
C. it involves the sharing of electrons
Explanation:
A covalent bond consists of the mutual sharing of one or more pairs of electrons between two atoms. These electrons are attracted by the two atomic nuclei. A covalent bond forms when the difference between the electronegativities of two atoms is too small for an electron transfer to occur to form ions.
hope this helps :)
In the malate-aspartate shuttle, _____ is reduced to _____ in the cytosol. oxaloacetate; malate aspartate; malate malate; aspartate malate; oxaloacetate aspartate; oxaloacetate
Answers
The malate-aspartate shuttle enables oxidative phosphorylation by allowing electrons to be moved across the inner membrane in the mitochondrion during glycolysis in eukaryotes.
In this malate-aspartate shuttle, oxaloacetate is reduced to malate in the cytosol.
During this biochemical system process, the cytosolic malate dehydrogenase which is the primary enzyme present in this shuttle system catalyzes the reaction of oxaloacetate and NADH to produce malate and NAD in the cytosol. This system enables oxidative phosphorylation in eukaryotes.Learn more: https://brainly.com/question/17216910
N2 + O2 → N205
how do i show my work im trying to balance the equation
Answers
Answer:
2N2 + 3O2 –2N2O3 this what I got balancing though
A solid magnesium flare has a mass of 1300 g and a volume of 743 cm3. What is the density of the magnesium?
Answers
Answer:
1.74 g/cm3
Explanation:
density=mass/volume
Explanation:
density = 1300/743
or density=1.74g/cm3
One of the following is not a property of metals
а
high malleability
ь
high compressibility
с
high melting point
d
high ductility
Answers
Answer:
option b
Explanation:
high compressibility is not a property of metal.
8. In an ionic bond, electrons are
electrons are
while in a covalent bond,
?
Answers
Answer:
in covalent bond electrons are shared by atoms
(6) Predict the number of valence electrons for each of the following elements (4 pts)
(a) P
(b) Ar
(c) c
(d) Ni
Answers
Answer:
P = 5, Ar = 8, C = 4, Ni = 2
Explanation:
All these answers can be based off which column of the periodic table each element is in. This does exclude the transition medals in between the 2nd and 13th columns. Column 1 = 1, Column 2 = 2, Column 3 = 3 and so on. Transition metals can be determined based on their electron configuration, which in this case, Ni has 2 electrons in its outer most shell.
A clear liquid in an open container is allowed to evaporate. After three days, a solid is left in the container. Was the clear
liquid an element, a compound, or a mixture?
Answers
The liquid did not chemically bond after 3 days, therefor it is a mixture.
Hope this helps!
A wave is moving towards shore with a velocity of 5.0 MS if it’s frequency is 2.5 Herz what is the wave length
Answers
Answer:
2 mExplanation:
The wavelength of a wave can be found by using the formula
[tex]\lambda = \frac{c}{f} \\[/tex]
where
c is the speed of the wave
f is the frequency
From the question
c = 5 m/s
f = 2.5 Hz
We have
[tex] \lambda = \frac{5}{2.5} = 2 \\ [/tex]
We have the final answer as
2 mHope this helps you
Which does ionic bonding involve?
Answers
Can i get help im not really good at science
Answers
cause- hot weather
effect- you sweat
Answer:
Cause and effect, easy.
in a battery that uses a licoo2 cathode approximately 50% of the lithium migrates from the cathode to the anode on charging. in a battery that uses a limn2o4 cathode what fraction of the lithium in limn2o4 would need to migrate out of the cathode to deliver the same amount of lithium to the graphite anode?
Answers
Answer:
92.4%
Explanation:
Assume 100g of the cathode material. The LiCoO2 cathode has 7.09 g of Li. If half of Li migrates during charging, 3.55g Li migrates. 100g of the LiMn2O4 cathode contain 3.84g of Li. The fraction of lithium in LiMn2O4 that would need to migrate out of the cathode to deliver the same amount of lithium to the graphite anode:
(3.55g/ 3.84g ) * 100% = 92.4%
From electrolysis, 92.4% would need to migrate out of the cathode to deliver the same amount of lithium to the graphite anode.
What is electrolysis?
Electrolysis is a technique that uses direct electric current (DC) to drive an otherwise non-spontaneous chemical reaction. Electrolysis is commercially important as a stage in the separation of elements from naturally occurring sources such as ores using an electrolytic cell. The voltage that is needed for electrolysis to occur is called the decomposition potential.
Assume 100 g of the cathode material. The LiCoO₂ cathode has 7.09 g of Li. If half of Li migrates during charging, 3.55 g Li migrates. 100 g of the LiMn₂O₄cathode contain 3.84 g of Li. The fraction of lithium in LiMn₂O₄ that would need to migrate out of the cathode to deliver the same amount of lithium to the graphite anode:(3.55 g/ 3.84 g ) × 100% = 92.4%
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An element has 3 electrons, 3 protons and 4 neutrons. What will be its atomic number and mass number? (
Answers
Answer:
its atomic number will be 3 and it's mass number will be 7. it is lithium
Cómo se clasifica el aire?
Answers
Answer:
Not me
Explanation:
"Solution is a homogeneous mixture" explain
Answers
Answer:
solution is equal distribution of a solute and liquid
Explanation:
for example water and sugar make a solution
Solutions with a uniform composition are homogeneous solutions. A homogeneous solution, then, has an equal concentration of the constituent substances throughout the entire solution.
Similar to how water molecules are evenly distributed among the Na+ and Cl- ions when sodium chloride dissolves in it. The mixture's composition is constant throughout, and it is difficult to separate the components from one another. Solutions are homogeneous mixtures, which can contain substances in either state (solid, liquid, or gas).
Even if the components were evenly dispersed, they could still be separated at some point in a homogeneous mixture. The components may need to be separated using a procedure like evaporation, distillation, or chromatography, but this is still possible.
Learn more about Homogeneous solutions;
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what will you observe when you open a bottle of concentrated hydrochloric acid?
Answers
Answer:
Strong affinity of HCl gas for moisture in air results in forming of droplets of liquid solution which appears like a cloudy smoke.
Explanation:
#followformore
Hope this helps :)
which of the following elements forms coloured compounds. A. Normal B. Transition C. Lanthanicles D. Inner transition
Answers
Answer:
B. Transition
Explanation:
Transition elements form coloured compounds because they have unfilled d orbitals.
What happens to the speed of the particles of the physics book?
Answers
Answer:
the physics book particales speed up and when you move the chemistry book
Answer:
The speed of the particles of the physics book increases when the chemistry book slides across the physics book.
Explanation:
i got it right when i did this
Write a Claim based in this question: What happens in the atmosphere and how
is it related to the water cycle.
Answers
Answer:
The atmosphere is the superhighway in the sky that moves water everywhere over the Earth. Water at the Earth's surface evaporates into water vapor which rises up into the sky to become part of a cloud which will float off with the winds, eventually releasing water back to Earth as precipitation.
Explanation:
If you don't want to plagiarize change it up a bit.
Which statements accurately describe elements? Check all that apply.
Elements are made up of two or more types of atoms.
Elements are made up of only one type of atom.
Each element has a unique chemical symbol.
Elements can be identified by their atomic number.
One element cannot be combined with another element.
Answers
Answer:
Elements are made up of only one type of atom. Each element has a unique chemical symbol. Elements can be identified by their atomic number.Explanation: