Periodic table, group 1 and group 2

There are ....... elements in the periodic table.

• 63

• 33

• 118

• 132

The number of electrons in the last energy level represents the

• Number of group

• Number of period

• Atomic number

• Mass number

The number of the energy levels occupied represents

• The number of period

• The number of group

• Atomic number

• Mass number

Chlorine has an atomic number of 17. Locate the element in the periodic table.

• Group 5 period 2

• Group 7 period 3

• Group 1 period 4

• Group 2 period 3

Neon has an atomic number of 10 . Locate the element.

• Group 2 period 7

• Group 8 period 2

• Group 7 period 1

• Group 4 period 3

As we go down group 1, the density

• Increase

• Decrease

• Stays the same

When we go down group 2, melting point and boiling point

• Increase

• Decrease

• Stays the same

From the following elements, which one is the least reactive in group 1

• Lithium

• Sodium

• Potassium

• Rubidium

Which element in group 2 does not react with Oxygen or water?

• Calcium

• Magnesium

• Beryllium

• Strantium

One of the uses of Sodium is

• Coolant for nuclear reactors

• Health of the bones

• Bleach

• Fireworks