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. 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 formula of silver [I] chloride is __________ [AgCl//AgCl_(2)]

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. 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. 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 element molybdenum used in the reaction of nitrogen with hydrogen at elevated temperatures is an example of a ____________[promoter/catalyst].

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. Kerosene & water form a………...(miscible/immiscible) mixture.

Complete the statements by filling the blanks with the correct word from the bracket. Sodium oxide combines with carbon dioxide to give…… (sodium carbonate/sodium bicarbonate).