SSC MTS EXAM

Detailed explanation-1: -An atom is the smallest particle of an element, having the same chemical properties as the bulk element. The first accurate theory explaining the nature of matter was Dalton’s Atomic Theory : 1. All matter is composed of atoms, and atoms are indivisible and indestructible.

Detailed explanation-2: -An atom is a particle of matter that uniquely defines a chemical element. An atom consists of a central nucleus that is surrounded by one or more negatively charged electrons. The nucleus is positively charged and contains one or more relatively heavy particles known as protons and neutrons.

Detailed explanation-3: -Quarks are the smallest particles we know . Many quarks make up one electron, proton and neutron.

Detailed explanation-4: -Electrons are the least massive of an atom’s constituent particles, with a mass of 9.11 x 10-31 kg and a size too small to be measured by current techniques.