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Aleks04 [339]
3 years ago
13

From top to bottom in most groups of elements, atomic radii tend to A. decrease because the nuclear charge increases. B. decreas

e because electrons are lost to other elements. C. increase because electrons are gained from other atoms. D. increase because additional energy levels are filled.
Chemistry
2 answers:
Taya2010 [7]3 years ago
6 0

<u>Answer:</u> The correct answer is Option D.

<u>Explanation:</u>

Atomic radius is defined as the total distance from the nucleus to outermost orbital of the electron.

As moving from top to bottom, new shell is added around the nucleus. The outermost orbital gets far away from the nucleus and hence, the distance between the nucleus and outermost orbital gets increased.

Thus, the atomic radii of the elements increases as we move from top to bottom in a group.

Hence, the correct answer is Option D.

Stels [109]3 years ago
4 0
D. As more electrons are added to an element, the number of electron orbitals being filled increases
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Explanation:

The dipoles in CO are in opposite directions so they cancel each other out, although CO₂ has polar bonds, it is a nonpolar molecule. Therefore, the only intermolecular forces are London dispersion forces. Water (H2O) has hydrogen bond present which is a polar bond which has a high intermolecular force.

Water which has high intermolecular force will require more energy that is a higher temperature to overcome these attractions and are pulled together tightly to form a solid at higher temperatures, so their freezing point is higher.

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Consider the potassium permanganate reaction again.
Rus_ich [418]
Hey there !

Mole ratio :

<span>2 KMnO4 + 16 HCl → 2 KCl + 2 MnCl2 + 8 H2O + 5 Cl2

2 moles KMnO4 ----------------- 8 moles H2O
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</span>The option that was given is wrong , <span>You're right.</span>
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