Question

Metal a has electronic configuration 2 8 1 and metal Bee has electronic configuration of 2882 out of these which metal is more relative write the reaction of the metal with dilute HCl

Answer 1

metal a is sodium while metal b is calcium. Sodium is more reactive than calcuim according to reactivity series.
potassium
sodium
calcium
magnesium
aluminium
On reaction of sodium with hcl, h2 gas is produced and a salt sodium chloride is formed
Na + HCl ➡Nacl + H2
on balancing the equation becomes
2Na + 2HCl ➡ 2 Nacl + H2

on reaction of calcuim with hydrochloric acid we will get calcuim chloride and hydrogen gas is released.
Ca + HCl ➡ Cacl2 + H2
on balancing we get,
Ca + 2HCl➡ Cacl2 +H2