The sodium metal is soft due to

Metal that difficult to oxidize are called

A. weak metals

B. strong metals

C. noble metals

D. ionic metals

On contact with oxygen, Rubidium forms

A. normal oxide

B. per oxide

C. super oxide

D. trioxide

The most metallic among the following is

A. Na

B. K

C. Al

D. B

As we move across the period the electronegativity

A. decreases

B. increases

C. remains same

D. becomes zero

As we move across the period from left to right, the reactivity of metals with oxygen

A. decreases

B. increases

C. remains same

D. zero