(English Medium) ICSE Class 9 - CISCE Question Bank Solutions

 The position of elements A, B, C, D and E in the periodic table are shown below:

Which is larger in size (i) D or E (ii) B or C

Write the electronic configuration of element ₁₇T³⁵.

1. What is the group number of T?
2. What is the period number of T?
3. How many valence electrons are there in an atom of T?
4. What is the valency of T?
5. Is it a metal or non-metal?
6. State number of protons and neutrons in T.

Element P has atomic number 19. To which group and period, does P belong? Is it a metal or a non-metal? Why?

An element belongs to the third period and Group IIIA (13) of the periodic table. State: the number of valence electrons,

An element belongs to the third period and Group IIIA (13) of the periodic table. State: the valency,

An element belongs to the third period and Group IIIA (13) of the periodic table. State: if it is a metal or non-metal?

An element belongs to the third period and Group IIIA (13) of the periodic table. State: the name of the element. 

Name and state the following with reference to the elements of the first three periods of the periodic table.

Metalloid in Period 3.

Name and state the following with reference to the elements of the first three periods of the periodic table.

Valency of elements in Group 14 and 15.

Name and state the following with reference to the elements of the first three periods of the periodic table.

Non-metallic elements present in Period 3 of Groups 15 and 16.

Name and state the following with reference to the elements of the first three periods of the periodic table.

Alkaline earth metal in period 3.

State the nature of compounds formed when group 17 elements combine with (i) metals (ii) non-metals.

Going across a period left to right, atomic size _____.

Moving left to right in the second period, the number of valence electrons _____. 

Moving down in the second group, number of valence electrons ______.

An element A has 2 electrons in its fourth shell. State:

its valency

An element A has 2 electrons in its fourth shell. State:

position in the periodic table

An element A has 2 electrons in its fourth shell. State:

is it a metal or non-metal

An element A has 2 electrons in its fourth shell. State:

is it an oxidising or reducing agent 

Give the general group study of hydrogen with reference to

valence electrons