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tatiyna
3 years ago
5

** ANSWER IS A** As you move from left to right across Period 3, which statement is true of the number of

Physics
2 answers:
frosja888 [35]3 years ago
8 0

Answer:

READ YOUR QUESTION CAREFULLY:

If it says <em>left to right</em>, the answer is A. The number of valence electrons increases by 1.

If it says <em>right to left</em>, the answer is B. The number of valence electrons decreases by 1.

Good luck :)

Sedbober [7]3 years ago
7 0

Answer:

A. The number of valence electrons increases by 1.

Explanation:

As you move across any period on the periodic table, the number of valence electrons increases by a value of 1.

  • The periodic table of elements contains an arrangement of element by their atomic numbers.
  • From left to right, number of valence electrons increases.
  • Down a group, the valence electrons are the same.
  • Across a period, the number of valence electrons increases.
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