The basis of modern periodic law is__________.

(a)

atomic number

(b)

atomic mass

(c)

isotopic mass

(d)

number of neutrons

_____ is a relative periodic property.

(a)

atomic radii

(b)

ionic radii

(c)

electron affinity

(d)

electronegativity

In the aluminothermic process the role of Al is _____.

(a)

oxidizing agent

(b)

reducing agent

(c)

hydrogenating agent

(d)

sulphurising agent

Which of the following have inert gases 2 electrons in the outermost shell.

(a)

He

(b)

Ne

(c)

Ar

(d)

Kr

______ is an important metal to form amalgam.

(a)

Ag

(b)

Hg

(c)

Mg

(d)

Al