_________ are malleable and ductile.
Non - metals
Metals
Metalloids
Noble Gases
Noble gases have _________ molecules.
Poly atomic
Tri atomic
Di atomic
Mono atomic
_______ emit radiations which may be harmful.
Radio active elements
Non metals
_______ are substances that cannot be separated into simpler substances.
Elements
Compounds
Mixtures
Solutions
_______ represents the element hydrogen.
N
O
H
I
________ are inert gases.
The number of atoms of an element that can join together to form a molecule of that element is known
Radio activity
Atomicity
Ionisation
Attractivity
________ of elements is the whole number in which atoms of different elements combines to form a molecule of a compound.
Valency
Ionicity
Molecularity
Two or more atoms of the same element combine to form molecules of
Ions
An element
H2 is