Atomic Size Worksheet

Fill in the blanks with the correct words.
1. Atomic size is usually expressed as half the diameter ___________.

• atomic radius

• atomic mass

• atomic number

• atomic volume

Moving from top to bottom in the same group in the periodic table, atomic size ___________.

• increases

• decreases

• remains the same

• first increases then decreases

The number of protons and electrons ___________ affects the atomic size.

• directly

• indirectly

• rarely

• never

Atomic size ___________ when moving from left to right across a period.

• decreases

• increases

• remains the same

• varies irregularly

Atomic size changes due to the different effects between protons and electrons.

• changes

• remains constant

• increases only

• decreases only

What does atomic size refer to?

• Atomic weight

• Atomic radius

• Atomic mass

• Atomic number

Which of the following factors affects atomic size?

• Number of neutrons

• Number of protons and electrons

• Temperature

• Pressure

How does atomic size change when moving from left to right across a period?

• Increases

• Remains constant

• Decreases

• Does not change

Which of the following elements has the smallest atomic size?

• Helium

• Oxygen

ما هو العامل الرئيسي الذي يحدد الحجم الذري؟

• الوزن الذري

• عدد الإلكترونات التاكاوف

• نصف القطر الذري

• العدد الذري