Question

• Define Atomic number, Atomic weight and Atomic symbol?

Answer 1

Part: 1: An explanation for Atomic number

• An element whose atomic number is equal to the number of protons in the nucleus or electrons in a neutral atom.
• It is denoted by (Z)
• Atomic number (Z) = no: of protons(p) =no: of electrons(e)

Part: 2: An explanation for Atomic weight

• The sum of protons and neutrons in the nucleus of an atom.
• It is denoted by (A)
• Atomic mass (A) = no: of proton(p) + no: of neutrons(An explanation

Part: 3: Explanation of Atomic symbol:

• A code to identify a specific element in the periodic table

The atomic symbol consists of three parts:

• The mass number is the sum of the number of neutrons and protons.
• Atomic number is the number of protons.
• The electrical charge represents the net gain(for anions) or loss (for cations)of electrons.