Which subatomic particle is present in the nucleus of an atom according to Rutherford's model?

• proton and electron

• proton and neutron

• neutron and electron

• proton only

If the first and second energy levels of an atom are full, how many electrons are in the atom?

• 6

• 8

• 10

• 18

Which atomic model is proposed by Schrodinger?

• nuclear model

• raisin bread model

• planetary model

• quantum mechanical model

How many orbitals are in the third principal energy level?

• 3

• 6

• 9

• 2

Which electron transition results in the emission of energy?

• 3p to 3s

• 3p to 4p

• 2s to 2p

• 1s to 2s

Which configuration is possible in an excited state of electron?

• 2He : 1s2

• 11Na : 1s22s22p63d1

• 1H : 1d1

• 10Ne : 1s22s22p53s1

What particle is produced after covalent bonding?

• atom

• molecule

• ion

• electron

How does ionic bonding take place?

• Two non-metallic elements of different kinds form strong forces of attraction.

• Two non-metallic elements of the same kind form strong forces of attraction.

• A non-metallic element like chlorine is attracted to a metallic element like sodium.

• A metallic element like sodium transfers an electron to a non-metallic element like chlorine.

Which property of atoms best indicates the type of bond that will form between them?

• atomic size

• electronegativity

• ionization energy

• electron affinity

Why can metals be hammered without breaking?

• They are ductile

• They are malleable

• They are not brittle

• Their particles are strong