Question

Define the following term i] Atomic number ii] Quantum number iii] Orbit​

Answer 1

Define the following:

i.) Atomic number:

➛ Atomic number is the number of protons present in the nucleus of an atom. It is donated by letter Z.

Assimilate:

• An atom of an element has its own characteristics number of protons in its nucleus which distinguish it from the atoms of the other elements.
• Atomic number is unique for atoms of each element.
• The atomic number of an element is the number of:

1. electrons present in its neutral atom.
2. protons present in the nucleus of its atom.
3. positive charge in the nucleus of its atom.

ii.) Quantum number:

Quantum number is a set of numbers that is used to describe the position of an electron or the energy of an electron in an atom of an element.

Four quantum numbers are:

1. Principal quantum number.
2. Magnetic quantum number.
3. Angular momentum quantum number
4. Spin quantum number

iii.) Orbit:

The electrons revolving around the nucleus are confirmed to a certain fix shells or energy levels called orbits, each of which is associated with a fixed amount of energy.

• While electrons revolve around the nucleus in their own orbit, an electron neither gains nor loses energy.

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