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10 questions
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
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