General Science Class 7

In modern periodic table, how many periods are there?

1. 7
2. 8
3. 9
4. 6

In modern periodic table, how many groups are there?

1. 12
2. 18
3. 7
4. 8

The number shown above the symbol of element is called?

1. Mass Number
2. Valency
3. Atomic Number
4. Oxidation State

The number shown below the symbol of element is called?

1. Mass Number
2. Atomic Number
3. Valance Number
4. Atomic Mass

The maximum number of electrons K orbit possesses?

1. 2
2. 4
3. 6
4. 8

The maximum number of electrons L orbit possesses?

1. 4
2. 8
3. 12
4. 18

The maximum number of electrons M orbit possesses?

1. 4
2. 8
3. 12
4. 18

Ions are charged particles of atoms and form negative and positive charges due to:

1. Proton
2. Electron
3. Neutron
4. None

Atoms that gain electron will become negatively charged ion and they are known as?

1. Ion
2. Cation
3. Isotope
4. Anion

Nuclei having the same nuclear charge but different masses are called:

1. Isobars
2. Isotopes
3. Isoelectronic
4. Isomers