Question 4 (a)
Lithium, sodium, potassium are all metals that react with water to liberate hydrogen gas. Is there any similarity in the atoms of these elements?

Q. (a) Lithium, sodium, potassium are all metals that react with water to liberate hydrogen gas. Is there any similarity in the atoms of these elements?

Q.

(a) Lithium, sodium, potassium are all metals that react with water to liberate hydrogen gas. Is there any similarity in the atoms of these elements?

(b) Helium is an unreactive gas and neon is a gas of extremely low reactivity. What, if anything, do their atoms have in common?

Q. Arrange the following elements in the increasing order of their atomic radii.
Hydrogen, potassium, sodium, lithium

Q. Which of the following compounds reacts with sodium to liberate hydrogen gas?

Q. Read the following statements carefully and select the option which correctly identifies the true (T) and false (F) statements.

(i) Potassium and magnesium react vigorously with cold water.

(ii) Gold, silver and platinum are noble metals.

(iii) Most metals liberate hydrogen gas on reacting with acids.