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Angelina_Jolie [31]
3 years ago
15

The atomic radii of Li, Na, and Rb are 152 pm, 186 pm, and 244 pm, respectively. What is a reasonable estimate for the atomic ra

dius of K? Group of answer choices 231 pm
105 pm
268 pm
163 pm
Chemistry
2 answers:
Grace [21]3 years ago
6 0

Answer:

<h3>The radii of potassium is <u><em>231 pm</em></u></h3>

Explanation:

erastova [34]3 years ago
3 0

Answer:

The radii of potassium is 231 pm

Explanation:

Atomic radii trend along group:

As we move down the group atomic radii increased with increase of atomic number. The addition of electron in next level cause the atomic radii to increased. The hold of nucleus on valance shell become weaker because of shielding of electrons thus size of atom increased.

The given elements are present in same group i.e group one,

Li     152 pm

Na    186 pm

K

Rb    244 pm

The radii of potassium must be greater than sodium and smaller than rubidium.

Thus the value must be between 186 pm - 244 pm

it means the radii of potassium is 231 pm.

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8 0
3 years ago
Chemistry acids and bases
Ket [755]

Answer:

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4 0
3 years ago
1. Which of the following is NOT a cation?
Bezzdna [24]
Hey Madoudou


The correct answer is option B (sulfate)


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3 0
3 years ago
As the energy of the molecules increases, the motion of the molecules _______.
Alexus [3.1K]

Answer:

the motion of molecules increases

6 0
2 years ago
Chlorophyll a is one of the green pigments found in plants. Chlorophyll a has the molecular formula C55H72MgN4O5. How many atoms
yuradex [85]
We add up all the various atoms:
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H: 72
Mg: 1
N: 4
O: 5

55 + 72 + 1 + 4 + 5
= 137

The answer is B.
3 0
2 years ago
Read 2 more answers
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