prep 2 , lesson 2 , atomic size

The atomic size is determined by knowing the atomic radius of the atom and its measuring unit is.........

• metre

• millimetre

• nanometre

• picometre

Of the halogens, which has the smallest radius?

• F

• Br

• He

• At

Which element in Period 2 has the greatest atomic radius?

• Be

• C

• Na

• Li

The atomic size ................. from left to right in the same period

• Increases

• Decreases

The atomic size .................. from up to down in the same group

• Increases

• Decreases