1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
lorasvet [3.4K]
3 years ago
9

Which scientist arranged the elements in order of increasing atomic number, rather than increasing atomic mass? Antoine Lavoisie

r Dmitri Mendeleev Henry Moseley John Newlands
Chemistry
2 answers:
Natalka [10]3 years ago
6 0
The answer is Henry Moseley
Luba_88 [7]3 years ago
4 0

The answer is: Henry Moseley.

Henry Gwyn Jeffreys Moseley (1887–1915) proposed that the number of positive nuclear charges (protons) in atom is equal to its atomic number in the periodic table.

Mendeleev did not know about isotopes and he arranged the elements in order of increasing relative atomic mass.

For example, positions of iodine and tellurium were reversed in Mendeleev's table, because of different isotopes, but Moseley solved anomalies like this one.

You might be interested in
Bromo-4-fluorohexane has two chiral carbon atoms; therefore, the maximum number of possible stereoisomers that can be formed is
Zepler [3.9K]

Here we have to draw the four isomers of the compound 3-bromo-4-fluorohexane.

The four isomers of the compound is shown in the figure.      

In an organic molecule the chiral -C center is that where four (4) different groups are present. In 3-bromo-4-fluorohexane the 3 and 4 positions are chiral centers. The possible isomers of a molecule can be obtained from the formula 2n. As here 2 chiral centers are present thus number of stereoisomers will be 2×2 = 4.

The four different isomers as shown in the figure are 3R-, 4R-; 3S-, 4S; 3R, 4S and 3S-, 4R- 3-bromo-4-fluorohexane.

In the 3-bromo-4-fluorohexane the functional groups are -Br, C₂H₅, -C₃H₆F and -H for 3-position and -F, -C₂H₅, -C₃H₆ and -H for 4-position respectively.

The priority of the -3 position will be Br > C₃H₆F > C₂H₅ > H and for -4 position F > C₃H₆Br > C₂H₅ > H. If the rotation from the higher priority group to lower is clockwise and anticlockwise then the S- and R- notation are used respectively. However if the -H atom is present at the horizontal position then the notation will be reverse.

Thus the four isomers of the compound is shown.      

4 0
3 years ago
Write the isotope notation for the following isotope: copper-63, copper-65, magnesium-24, magnesium-25, magnesium-26, lithium-6,
andrey2020 [161]
63/29 Cu (copper-63)
65/29 Cu (copper-65)
24/12 Mg (magnesium 24)
25/12 Mg (magnesium 25)
26/12 Mg (magnesium 26)
6/3 Li (lithium 6)
7/3 Li (lithium 7)

The top number is the mass number and you find that by adding the number of neutrons and atomic number
The bottom number is the atomic number and it’s the number or protons
3 0
2 years ago
Which product of the ultraviolet decomposition of cfcs acts as the catalyst for ozone decomposition?
Vikentia [17]
The answer is <span>Chlorine atoms.   This is the </span><span>product of the ultraviolet decomposition of cfcs acts as the catalyst for ozone decomposition.  </span>
8 0
2 years ago
Which part of the energy profile of a chemical reaction that goes to completion is typically the highest in energy? A. The activ
Helen [10]
The answer is D transition state. In the energy profile, the transition state is the highest point. For a reaction, the activation energy is the minimal energy needed to trigger a reaction. The reactants are the start of the reaction and the products are the end of the reaction.
4 0
3 years ago
Which of the following has the lowest entropy?
Valentin [98]
I believe that the answer is B:  H2O(s) because is the makeup of water also known as one hydrogen and two oxygen. So water as more entropy and the s stands for sol fore i think wich means it contains the most entropy.
5 0
3 years ago
Read 2 more answers
Other questions:
  • Write the electron configuration​
    15·1 answer
  • 8. If an atom has 35 protons in the nucleus, how many electrons will it have orbiting the nucleus?
    9·1 answer
  • A 250-mL glass bottle was filled with 242mL of water at 20°C and tightly capped. it was then left outdoor overnight, where the a
    7·2 answers
  • One of the great upcoming sports in the Olympics is the sport of curling. Write a brief essay on the uses of momentum collisions
    11·2 answers
  • which atomic particle determines the chemical behavior of an atom the nucleus, neutron, electron, proton or none of these
    9·1 answer
  • Why this chemical equation 3P4 + 10O2 = 4P2O5 + P4 is wrong?
    15·1 answer
  • A generator is not required to generate electrical energy when which of the following energy sources is used?
    14·2 answers
  • The sun causes water in the pond to evaporate
    9·2 answers
  • (04.02 LC) Based on the cell theory, which of the following is true?
    12·1 answer
  • ASAP HELP
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!