During the preparation of __________ energy such as heat, light and electricity is neither absorbed nor evolved.
Atoms
Compounds
Molecules
Mixture
Mercury in amalgamated form is a homogeneous ___________ mixture.
Liquid in liquid
Liquid in solid
Solid in liquid
Solid in solid
The properties of ____________ are entirely different from those of its constituent.
Mixtures
Alloys
Each ____________ can be described by its formula, usually called molecular formula.
Elements
__________ of an element is an abbrevation for its full name.
Symbol
Chemical properties
Physical properties
Reactivity
______________ are the basic constituents of all matter.
Complexes
A compound containing sodium, carbon and oxygen is
Sodium carbonate
Sodium bicarbonate
Sodium hydroxide
Sodium chloride
___________ is non-metal that is liquid at ordinary temperature and pressure.
Carbon
Bromine
Phosphorous
Sulphur
_________ is liquid at room temperature.
Gold
Copper
Mercury
Iron
___________ is the smallest particle which take part in a chemical reaction.
