ICSE ICSE Class 7 - CISCE Question Bank Solutions for Chemistry

 Fill in the blank:

Atoms are _____

Fill in the blank

An ion with positive charge is called ______

Fill in the blank

An ion with negative charge is called _______

Fill in the blank

_______ is a triatomic molecule.

State the term

The symbolic representation of a molecule ______

State the term

A group of atoms that react as a single unit ______.

State the term

The combining capacity of an element _______

Define: Ions

Define: Chemical bond

Define: Mass number

Define: Relative atomic mass

What does an atom consist of ? Explain.

 Give the charge and the mass of an electron, proton and neutron present in an atom ?

Name two particles found inside the nucleus. What are they collectively called ?

 Name the particles which revolve around the nucleus.

What are orbits or shells ?

What is the maximum number of electrons present in:

1. first shell
2. second shell
3. third shell and
4. fourth shell

Name three non-metals/radicals which have valency -1, -2, and -3.

Define: Covalent bond

Give two examples for each of ionic and covalent bond.