Answers
Related Questions
The atomic weight of iodine is less than the atomic weight of tellurium. However, Mendeleev listed iodine after tellurium in his original periodic table because he suspected the atomic weights for these elements were inaccurate. What was Mendeleev's reason for this suspicion?
Answers
Explanation :
As we know that Mendeleev arranged the elements in horizontal rows and vertical columns of a table in order of their increasing relative atomic weights.
He placed the elements with similar nature in the same group.
According to the question, the atomic weight of iodine is less than the atomic weight of tellurium. So according to this, iodine should be placed before tellurium in Mendeleev's tables. But Mendeleev placed iodine after tellurium in his original periodic table.
However, iodine has similar chemical properties to chlorine and bromine. So, in order to make iodine queue up with chlorine and bromine in his periodic table, Mendeleev exchanged the positions of iodine and tellurium.
As we know that the positions of iodine and tellurium were reversed in Mendeleev's table because iodine has one naturally occurring isotope that is iodine-127 and tellurium isotopes are tellurium-128 and tellurium-130.
Due to high relative abundance of tellurium isotopes gives tellurium the greater relative atomic mass.
The expression 6.020 x 10^23
Answers
Answer:
3
Explanation:
How do you know which elements increases or which elements decreases on a Ionisation graph? Like how can you figure out that these elements will increase on the graph and which will decrease?
Answers
Explanation:
There is a trend in the periodic table.
I.E increases up the group and across the period. So you know that metals have less I.E compared to non-metals.
If carbon lost one proton, what atom would be formed
Answers
Answer:
boron
Explanation:
boron has 5 protons and carbon has 6, so if carbon lost a proton, it would become boron since each element has a unique number of protons.
As each element has a different number of protons, boron has five and carbon has six, so if carbon lost one of its protons, it would change into boron.
What is proton ?Every atom has a proton, a subatomic particle, in its nucleus. The particle possesses an electrical charge that is positive and opposite to the electron's.
In the reaction, a proton is forfeited. Keep in mind that when the number of protons changes, the atomic number also changes, creating a new element. Carbon-14 is the end result as a result. It is a new element, yet it has the same mass as nitrogen-14.
When carbon creates covalent bonds, pairs of electrons are shared between the atoms instead of being gained or lost as happens with chemical bonds. The ability of carbon to construct lengthy chains of atoms and so create intricate biological compounds is due in part to this feature.
Thus, If carbon lost one proton, boron atom would be formed.
To learn more about proton, follow the link;
https://brainly.com/question/1252435
#SPJ2
Which statement describes the most common ways in which students and professional scientists communicate the
results of their scientific research?
O Students communicate results in oral reports to the class, and professional scientists communicate results in
written reports
Students communicate results in scientific journals, and professional scientists communicate results in laboratory
reports
Students communicate results in laboratory reports, and professional scientists communicate results in scientific
journals
Students communicate results through secondary sources, and professional scientists communicate results
through primary sources.
Answers
Answer:
Students communicate results in laboratory reports, and professional scientists communicate results in scientific journals.
Explanation:
This is the answer i just did it.
I hope this helps.
Answer:
Students communicate results in laboratory reports, and professional scientists communicate results in scientific journals.
Explanation:
brainliest please
Is there a relationship between density of an object and whether it will float sink or water in water?
Answers
Answer:
yes there is...........
Which cell structure is found in animals, but not in plants?
Answers
Animal cells each have a centrosome and lysosomes, whereas plant cells do not. Plant cells have a cell wall, chloroplasts and other specialized plastids, and a large central vacuole, whereas animal cells do not.
Answer:
1
Explanation:
The mass spectrum of the element Sb is most likely represented by which of the following?
A. 122 Atomic Mass
B. 121 and 123 Atomic Mass
C. 120, 123 and 124 Atomic Mass
D. 120,121 and 124 Atomic Mass
i know the answer is b i just need an explanation
Answers
Mass spectrometry is the technique that measures the ratio of mass to charge. The spectrum of the element Sb is most likely represented by 121 and 123 atomic mass. Thus, option B is correct.
What is Mass spectrometry?Mass spectrometry plots the spectrum representing the ratio of mass-to-charge by the signals generated by the ions. The spectrum estimates the mass and isotopes of the sample elements. They also determine the chemical properties and structures.
The spectrometry detects the isotopes that are stable and are known to have the same atomic number. It can be used to determine the isotopes of an element based on their peaks generated on the mass spectrum. Antimony has two stable isotopes with atomic masses 121 and 123.
Therefore, option B. the spectrum of the element Sb is most likely represented by Sb-121 and Sb-123.
Learn more about mass spectrometry here:
https://brainly.com/question/27549121
#SPJ6
1.In class, students learned that a cart will move when a force of 50 N or greater is applied. A student pushed on the cart with a force of 10 N. The cart did not move. Why not?
2. Student A pushed on the cart with a force of 500 N. Student B pushed on the other side of the cart. The cart did not move. How much force did student B apply? Explain how you know.
3. 3. Student A pushed on the cart with a force of 400 N. Student C pushed on the other side of the cart. The cart rolled to the left. Did student C apply more, less, or the same force as student A? Explain how you know.
Yo help me this is due in 15 mins
Answers
What is the Mechanical advantage of a machine that only changes the direction of the force?
Answers
Answer: 1
Explanation:
The number of times a machine increases a force exerted on it The input force will be the same as the output force.
What is found in the outer region of the electron cloud
Answers
What is one Scientific Law or Scientific Theory that affects our life?
Answers
Answer:
Does the Big Bang theory count?
List the common ion(s) for tungsten
Answers
Hope this helps please make my answer brainliest
Answer the following question.
Answers
what is kwaishokor?
Answers
Answer:
Kwaishokor is a form of severe protein malnutrition characterized by edema and an enlarged liver with fattty infiltrates.
Explanation:
Answer dis please I will like and 5 star if correct
Answers
Completion of the human genome map
a) during the 1800’s
b) 1990-present
c) before the 1800s
d) 1900-1988
Answers
Answer:
I think it a or c yea a or c
If the molar mass of a hydrocarbon is 26.0 g/mol and it’s empirical formula is CH what is the molecular formula
Answers
empirical formula
is the simplest whole number ration that defines constituent atoms in a species. The
molecular formula
is always a multiple of the
empirical formula
.
how does tungsten most common isotope relate to the average atomic mass of the element
Answers
Answer:
It has the most quantitative effect on the average atomic mass of the element.
Explanation:
Tungsten's most common isotope will have the most quantitative effect on the average atomic mass.
The most common isotope of tungsten will represent its most abundant isotope.
The proportion by which each element occurs in nature is the geonormal abundance. The geonormal abundance is used to calculate the average atomic mass.The isotope with the most geonormal abundance will have the highest effect on the average atomic mass of an element.
What do animals mean to you?
A)Lovable fur friends
B)Speacial to you
C)They are just animals
D)Who cares
Answers
Answer: OMG EMMM, PLZ ANSWER ME, I REALLY MISS U , plz come back...
Explanation:
Which of these substances is a mixture?
a: none of these are mixtures
b:Lemonade
c: gold
d: sugar
Answers
Answer:
Lemonade
Explanation:
Its a mixture of stuff to make a sweat drink :D
Can someone help me find the 5 digits numbers in here?
Answers
Answer:
20322
Explanation:
So first pumpkin - 2
The second pumpkin - 0
The third pumpkin I’m unsure of
The forth pumpkin - 2
The fifth pumpkin - 2
So 20?22
Just an idea for ya. Hopefully it helps
The change of matter, solid, liquid and gas is called a_________.
Answers
Answer:
This would be a phase change
Explanation:
Since the diffrent phases solid,liquid,gas are changing to other phases.
Sorry for the bad explanation.
Ecology is defunded as the environment study of
Answers
Answer:
sicoligy
Explanation:
this answer was wrong sorry
What is the mass in grams, if you have 8.42 x 10^18 atoms of Bromine
Answers
Answer:
84.2 grams
Explanation:
you have to multiply 8.42x10^18 to get the answer above
The number of the atom can be used to estimate the mass and moles of the substance by Avogadro's number. The mass of 8.42 x 10¹⁸ atoms of Bromine is equivalent to 0.0011 grams.
What is the mole concept?The mole concept has been the unit of the amount of estimating the mass of the substances with smaller entities. It uses the SI unit mol to measure the amount of mass. It also has been defined by 6.02214076 × 10²³ (Nₐ, Avogadro's number) elementary entities.
The molar mass of Bromine (Br) is 79.904 u and atoms are 8.42 x 10¹⁸.
Atoms to mass are converted as:
= ( 8.42 x 10¹⁸ atom ÷ 1 ) × ( 1 mole Br ÷ 6.02214076×10²³ ) × (79.904 gm Br ÷ 1 mol Br)
= (8.42 x 10¹⁸ × 79.904 gm) ÷ 6.02214076 × 10²³
= 6.727 × 10²⁰ ÷ 6.02214076 × 10²³
= 1.117 × 10⁻³ grams
Therefore, 0.0011 grams is the mass of bromine.
Learn more about the mole concept, here:
https://brainly.com/question/22540912
#SPJ2
Prompt
Explain how plate tectonics have changed Earth's surface over time. Include the role of plate tectonics in the creation of landforms.
Answers
Answer: The theory of plate tectonics tells us that the earth's surface sits on plates that shift due to the built up pressure underneath. When the pressure gets too much, it has to escape somewhere so it goes to the edges of the plate and causes earthquakes. This in turn causes the surface to shift.
Explain the concept: Law of Multiple Proportions.
Answers
Answer:
The Law of Multiple Proportions explain that when two elements from a series of compounds, (replacing the two elements as A and B), the ratios of the masses of the second element that combine with 1 gram of the first element can always be reduced.
The answer the other guy gave is incorrect, and plagiarized.
My answer came from a lesson I learned.
What is the atomic number, icon, mass of potassium?
This should be EASY!
Answers
Answer:
19, K, 39.098
Explanation:
Potassium is a chemical element with symbol K and atomic number 19.
Atomic Mass: 39.098u
What has the higher first ionization energy? Mg or Cl
Answers
Ionization Trend: First ionization energy will increase left to right across a period and increase bottom to top of a family (column).
If we compare Mg and Cl:
Mg is column 2 (far left) in the periodic table, while Cl is column 17 (far right). Based on the ionization rule explained above, Cl will have the higher first ionization energy.
15. Which of the following is a correct statement?
O Nuclear power plants produce non-radioactive waste.
O Nuclear power plants utilize nuclear fusion.
O Fission utilizes the limited fuel source uranium.
O The waste products from a nuclear reactor are no longer radioactive.
Answers
Answer:
The answer is A
Explanation:
Nuclear power plants produce non-radioactive waste
Answer:
A
Explanation: