What should be done in case of acid spills and mercury spills? explain

Explanation:

Acid spills

These types of spills should be neutralized with base like sodium bicarbonate and then must be cleaned up by using paper towel or  sponge. Strong base like sodium hydroxide must not be used to neutralize. Best base to use is sodium bicarbonate which has much less chance of the injury.

Mercury spills

Mercury is found commonly in  the thermometers. If one have mercury spill, it must be cleaned up immediately with  either commercial product like Hg Aborb ™ or by using elemental sulfur. Mercury sponges  can also be purchased that form amalgam with liquid mercury and thus trapping it on surface of sponge.

b) nuclear ive learned that in a pedtrodic table

nuclear fission produces elements that are heavier than helium.

the elements that are used in nuclear fission and their products are much heavier than helium.