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
Blizzard [7]
3 years ago
5

Which statement best explains why calcium has a larger atomic radius than magnesium? A. Calcium has a stronger nuclear charge th

an magnesium. B. Calcium has electrons in more energy levels than magnesium. C. Calcium has more neutrons than magnesium. D. Calcium’s third energy level contains more electrons than magnesium
Chemistry
2 answers:
ahrayia [7]3 years ago
7 0

Answer:

B. calcium has electrons in more energy levels than magnesium

Explanation:

atoms are made of three types of subatomic particles - electrons, protons and neutrons.

Neutrons and protons reside in the nucleus of the atom and electrons reside in energy shells

electronic configuration for both Ca and Mg are as follows

Mg - 2,8,2

Ca - 2,8,8,2

outermost energy shell of Mg with electrons is the third energy level

whereas outermost energy shell of Ca with electrons is the fourth energy shell

therefore Ca has a larger atomic radius than Mg as it has one more energy shell than Mg in which electrons reside

Stella [2.4K]3 years ago
7 0

Answer: Option (B) is the correct answer.

Explanation:

Atomic number of calcium is 20 so its electronic distribution is 2, 8, 8, 2, that is, number of shells occupied will be K, L, M and N.

Whereas atomic number of magnesium is 12 so its electronic distribution is 2, 8, 2, that is, number of shells occupied will be K, L and M.

Therefore due to increase in number of shells there will be increase in atomic size of the atom.

Hence, we can conclude that the statement calcium has electrons in more energy levels than magnesium best explains why calcium has a larger atomic radius than magnesium.

You might be interested in
SCIENCEEEE!!!! HELPPPPP MEEEE OUTTTT!!!!
krok68 [10]
B and e

first we need to balance the NH3 hence first we do E and multiplying the coefficient by 2. that will leave us with N2+H2–>2NH3.
N2 and H2 is balanced and now all that is left to do is the balance H2 by 3 as there is 6H on RHS hence we need 6H on LHS
3 0
3 years ago
Ght
Murljashka [212]

Answer 78

Explanation:

omg long

4 0
3 years ago
A pure substance that contains more than one atom is called a(n)...
gladu [14]

<u><em>Answer:</em></u>

  • A pure substance that contains more than one atom is called a compound.

<u><em>Explanation:</em></u>

  • Compounds are formed by combination of atoms by a fixed ratio. They have their own characteristic features.
  • Pure substances are further broken down into elements and compounds. A compound can be destroyed by chemical means. It might be broken down into simpler compounds, into its elements or a combination of the two.

<u><em>Example </em></u>

  • H2SO4 which  is formed by combination of three different atoms like H, S and O.
6 0
3 years ago
Read 2 more answers
What is the energy of a photon with a frequency of 5.90 × 10¹⁴ s⁻¹? (h = 6.626 × 10⁻³⁴ J • s)
Licemer1 [7]
You use either the formula
E
=
h
f
or
E
=
h
c
λ
.
5 0
2 years ago
Why is Cobalt (Co) placed before Nickel (Ni) on the Periodic Table of the Elements even though it has a higher average atomic ma
denis23 [38]

Answer: Nickel has one more proton.

Explanation:

The Periodic table orders elements based on their atomic number not by their atomic mass even though this order usually coincides with the atomic masses of the elements. Occasionally however, this is not the case as is proven by Cobalt and Nickel.

The atomic number of an element refers to the number of protons that the element has in its nucleus. Cobalt has 27 protons whilst Nickel has one more proton at 28 which is why it comes after Cobalt.

8 0
2 years ago
Other questions:
  • A 3.0 M HCl(aq) solution contains a total of
    15·2 answers
  • Set up a Hess’s law cycle, and use the following information to calculate ΔH∘f for aqueous nitric acid, HNO3(aq). You will need
    13·1 answer
  • Melting point of A , B , C , D are 299k , 111k ,150k ,340k.thai inter particles forces of attraction are in order: a) A
    13·1 answer
  • Lead(2) sulfate yields to lead(2)sulfite and oxygen
    14·1 answer
  • Which one of the following groups of chemical compounds is composed entirely of organic compounds?
    15·1 answer
  • 5.82 760.<br> Х<br> 425.976<br> answer should have<br> sig.figs.<br> calculated answer:
    10·1 answer
  • What will happen to the Sun in approximately 5.5 billion years?
    12·1 answer
  • Which kingdom does spiny lobster, and diatom belong to?
    7·1 answer
  • What is haber's process?​
    10·2 answers
  • Why do you think the older scientist disregarded the younger scientist's prediction?
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!