![]() ![]() The atomicity of nitrogen is N 2 i.e., 2.Īnswer: Charged atom is called as an ion. E.g., H 20 = 1 × 2 + 16 = 18 amuĪnswer: Atoms exist in the form of atom, molecule or ions.ĩ: Give the atomicity of phosphorous and nitrogen.Īnswer: The atomicity of phosphorus is P 4 i.e., 4. ![]() Answer: In a chemical reaction mass can neither be created nor destroyed.Īnswer: In a chemical substance the elements are always present in definite proportions by mass.Į.g., In water, the ratio of the mass of hydrogen to the mass of oxygen H : O is always 1:8Īnswer: John Dalton coined the term atom.Īnswer: The smallest particle of matter, which can take part in a chemical reaction is called atom.Īnswer: The smallest particle of an element or compound which can exist independently is called molecule.Īnswer: The number of atoms constituting a molecule is known as its atomicity.Īnswer: The sum of the atomic masses of all the atoms in a molecule of the substance is expressed.in atomic mass unit. ![]()
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