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Answered

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Which of the following is True for valence electrons?
A) Valence electrons are always located in the innermost energy level
B) Each element in the periodic table has a different number of valence electrons.
C) Valence electrons may be lost or gained by an atom when bonding occurs with another atom
D) When atoms collide with other atoms, they bond automatically

Sagot :

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C) Valence electrons may be lost or gained by an atom when bonding occurs with another atom

Answer: Option (C) is the correct answer.

Explanation:

Electrons present in the outermost shell of an atom are known as valence electrons.

For example, atomic number of calcium is 20 and its electronic configuration is 2, 8, 8, 2. This means that there are 2 valence electrons in a calcium atom.

These valence electrons can be lost or gained by an atom according to the octet rule and ability to gain stability.

Hence, we can conclude that the statement valence electrons may be lost or gained by an atom when bonding occurs with another atom, is True for valence electrons.

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