Structure of Atom

An element has 16 protons. The number of electrons present in the valence shell of this element are_________.

• 6

• 2

• 8

• 4

What is its valency?

• (a)Number of electrons lost during a bond formation

• (b) Number of electrons gained during a bond formation

• (c) Number of electrons shared during a bond formation

• All three options:(a),(b) and (c )

An element has 16 protons and 32 nucleons in its nucleus, how many neutrons are present in the atom?

• 8

• 16

• 18

• 48

Identify an element with two shells and five electrons in the valence shell.

• Nitrogen

• Oxygen

• Phosphorous

• Silicon

Identify an element with tendency to lose electrons, having three shells and valency 1.

• Potassium

• Sodium

• Lithium

• Chlorine

Identify an element with tendency to gain electrons, having three shells and valency 3

• Nitrogen

• Alumimium

• Boron

• Phosphorous

Identify an element with three shells and zero valency.

• Argon

• Neon

• Helium

• Kyrpton

Identify an element with one shell and zero valency.

• Hydrogen

• Helium

• Boron

• Argon

Identify an element with twice the number of electrons in its L shell as in its K shell.

• Sulfur

• Aluminium

• Carbon

• Silicon

If the atomic number of an element is 12. Predict the valency of this element. Is it a metal or a non-metal?

• 2,Non-metal

• 2,Metal

• 6,Non-metal

• 6,Metal