Atomic Structure and Chemical Bonding

Select an element which does not have neutron

• Tritium

• Helium

• Protium

• Deuterium

An element has 20 neutrons and 15 protons. Find the mass number of the atom.

• 25

• 20

• 30

• 35

Find the number of neutrons in the nucleus of an atom with atomic number 17 and mass number 37.

• 17

• 18

• 19

• 20

An element A with 10 neutrons, 9 protons and 10 electrons is

• Cation

• Anion

• Isotopes

• All of the above

Ammonia molecule has

• Double Covalent Bond

• Triple Covalent Bond

• three single covalent bond

• one single covalent bond

Calcium Oxide is formed by

• Sharing of electron

• Transfer of electron

Carbon Tetrachloride is

• Electrovalent compound

• covalent compound

• noble gas

Water has

• one lone pair

• one bond pair

• two lone pair

• three bond pair

X has atomic number 11. Y has atomic number 17. State The formula of the compound formed between them

• YX

• X₂Y

• XY

• Y₂X

An element W has atomic number 9. Find out whether it is

• metal

• non-metal

• noble gas

• all of the above