Question

What happens to the atomic mass of the elements moving from left to right within a period?

The atomic mass decreases.

The atomic mass fluctuates throughout the period.

The atomic mass stays the same within a period.

The atomic mass increases.

Answer 1

[AI-generated answer — Bot GPT 3.5]

The atomic mass generally increases as you move from left to right within a period.

Answer 2

[AI-generated answer — Step-by-Step Bot]

The atomic mass increases. As you move from left to right within a period, the atomic number increases, which means more protons and neutrons are added to the atom. Since the atomic mass is determined by the sum of protons and neutrons in an atom, it increases as you move across a period on the periodic table.