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

Name the elements in Period 1.

What is the common feature of the electronic configuration of the elements at the end of Period 2 and Period 3?

Supply the missing word from those in bracket:

If an element has one electron in its outermost energy level [shell] then it is likely to be _______.

The similarities in the properties of a group of elements are because they have the same ______.

What is meant by a Group in the Periodic Table?

Place the metals calcium, iron, magnesium and sodium in order of their activity with water, placing the most active first. Write the equation for each of the above metals which react with Water.

Why is copper not used to prepare hydrogen by the action of dilute hydrochloric acid or dilute sulphuric acid on the metal, [copper [Cu] below hydrogen – no reaction]

Name the period which is the shortest period of the periodic table.

Name the elements in the correct order of their increasing atomic numbers present in the first, second, and third short periods of the periodic table.
State which of the elements are –

1. metallic 
2. non-metallic 
3. noble gases

in each of the periods 2 and 3.

State the property trends in general of elements on moving from left to right in a period of the periodic table.

State the property trends in general of elements on moving down in a group of the periodic table.

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

A metalloid in period 2 and in period 3.

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

The number of electron shells in elements of period 1, period 2, and period 3.

Name or state following with reference to the element of the first three periods of the periodic table.

The valency of elements in group 1 [I–A].

Name or state following with reference to the element of the first three periods of the periodic table.

The non-metallic element present in period 3 other than sulphur and chlorine.

Name or state following with reference to the element of the first three periods of the periodic table.

A non-metal in period 2 having electronic configuration 2, 6.

Name or state following with reference to the element of the first three periods of the periodic table.

A covalent compound formed between an element in period 1 and a halogen.

Name or state following with reference to the element of the first three periods of the periodic table.

A metal in period 3 having valency 3.

Name or state following with reference to the element of the first three periods of the periodic table.

The formula of the hydroxide of the element having electronic configuration 2, 8, 2.

Name or state following with reference to the element of the first three periods of the periodic table.

The valency of the element in period 3 having atomic number 17.