ICSE ICSE Class 7 - CISCE Question Bank Solutions for Chemistry

Write electronic configuration of oxygen, fluorine, sodium, silicon, argon.

Who originated the word ‘atom’ ?

What does the word ‘atom’ mean?

State Dalton’s atomic theory.

How did Neils Bohr visualise the atom ?

Name the particle or particles you would expect to find in :

The orbit of an atom

Name the particle or particles you would expect to find in :

The nucleus of an atom

An atom has 13 protons and 14 neutrons.

What is the atomic number of the atom ?

An atom has 13 protons and 14 neutrons.

How many electrons would be present in this atom ?

An atom has 13 protons and 14 neutrons.

What is the atomic mass of the atom ?

Define: An Atom:

A certain particle ‘X’ has 17 protons, 18 electrons and 20 neutrons.

What is such a particle called ?

A certain particle ‘X’ has 17 protons, 18 electrons and 20 neutrons.

What is the mass number of X?

A certain particle ‘X’ has 17 protons, 18 electrons and 20 neutrons.

What is the atomic numebr of X ?

A certain particle ‘X’ has 17 protons, 18 electrons and 20 neutrons.

Does the particle have an excess of electrons or a deficiency of electrons ?

A certain particle ‘X’ has 17 protons, 18 electrons and 20 neutrons.

What is the charge on the particle ?

Fill in the blank

If an atom gains an electron, it is called an _______

Fill in the blank

If an atom loses an electron, it acquires ______ a charge.

Fill in the blank

A charged particle is called an _____

Fill in the blank

An _______ is electrically neutral.