Complete the statements given below by filling in the blank with the correct words.
The basic unit of an element is a/an__________[molecule/atom/ion]

Complete the statements given below by filling in the blank with the correct words. The valency of iron in FeO is __________[ 2^(+)//1^(+)] of chlorine [chloride ] in CaCl_(2) is ___________ [1^(-)//2^(-)] and of dichromate in K_(2)Cr_(2)O_(7) is _______ [2^(+)//2^(-)]

Complete the statements given below by filling in the blank with the correct words. The formula of silver [I] chloride is __________ [AgCl//AgCl_(2)]

Complete the statements given below by filling in the blank with the correct words. Element __________[calcium/lead/carbon]has the symbol derived from its Latin name plumbum.

Complete the statements given below by filling in the blank with the correct words. Atom contains ___________[neutron/nuclueus], with positively charged_______[electrons/protons].

Complete the statements given below by filling in the blank with the correct words. From the elements -He, Br, Pt & O, the element which forms a polyatomic molecule is __________ & which is liquid at room temperature is _____________

Complete the statements by filling in the blank with the correct word/s: The metal which reacts with steam and the reaction is reversible is _______[calcium/iron]

Complete the statements by filling in the blank with the correct word/s: The reaction of coke with steam to give water gas is an example of an_______[exothermic/endothermic] reaction.

Complete the statements by filling in the blank with the correct word/s: Decomposition of silver salts in the presence of sunlight is an example of __________[double decomposition/photochemical decomposition]

Complete the statements by filling the blanks with the correct word from the bracket. Solubility of a solute is the…………..[minimum/maximum) amount of solute that will saturate 100 g. of water at (t^@C)

Complete the statements by filling the blanks with the correct word from the bracket. The ratio of hydrogen & oxygen in water is……….[2:1/1:2]