Atomic number : ______ :: Mass number : Number of protons and neutrons.

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Atomic number: Number of protons:: Mass number: Number of protons and neutrons.

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Chapter 4 Atomic Structure
Evaluation | Q V. 2. | Page 51

State the main postulates of Dalton’s atomic theory.

Which of the following are true for an element?

Show diagrammatically the electron distributions in a sodium atom and a sodium ion and also give their atomic number.

What is a neutron?

Name the 3 sub-atomic particles of an atom.

Every atom has an equal number of protons and electrons. The nature of the atom is ______.

‘Z’ is denoted by ______.

Mass No. 27 is for the element ______.

K and L shells can accommodate a maximum of 2 and 8 electrons respectively.

Compare the charge and mass of protons and electrons.