Question 1: What is the smallest particle of an element that can take part in a chemical reaction?
Question 2:The smallest particle of a compound is _________
Question 3:Name an element which exists in the free state in nature.
Question 4:Name an element whose atoms occur in pairs.
Question 5:If the formula of an element is X3, its atomicity is _______
Question 6:If two compounds that do not react chemically are mixed, what do we get?
Question 7:From which of these two can elements be more easily separated−a mixture or a compound?
Question 8: Does a symbol represent an atom or a molecule?
Question 9:Write the formulae for sulphuric acid
Question 10: If a certain compound has a formula H2X, what is the valency of X?
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Answer:
1. atom
2.molecule
3.gold , paltinum etc
4.diatomic
5.3
6.we will simply get a mixture of compounds
7.a mixture can be easily separated than a compound
8. symbol s represent atoms
10.valency of X is 2
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