or elements with atoms that have three energy levels, the level that most influences the reactivity of the elements is the first (nearest the nucleus).

PHYSICAL SCIENCES

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Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]

A	True
B	False
C	Either A or B
D	None of the above

Explanation:

Detailed explanation-1: -Sodium is in the third period, so it has three energy levels. As the number describing the energy level increases, the energy of that level also increases.

Detailed explanation-2: -What element has 3 energy levels and a full outer energy shell? Group 18 elements (helium, neon, and argon) have a full outer, or valence, shell.

Detailed explanation-3: -The correct answer is Argon. Argon has three shells that are completely filled with electrons.

There is 1 question to complete.