In each of the cases, give the geometric (diagrammatic)
presentation along with:
(a) Number of protons 11/23Na
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Sodium is an alkali metal having 11 protons and 12 neutrons.
Ans hence it has an atomic mass of 23 amu.
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Geometrical representation of the electronic distribution in sodium atom is shown below.
What is an atom?
- Atom is the smallest basic unit of elements.
- Constituents of atom are protons, electrons and neutrons.
What is an electron?
- It is the negative charged particle in an atom.
- It is equal to the atomic number.
- It revolves around the nucleus of atom and different shells/orbits.
What is a proton?
- It is a positively charged particles posited in the nucleus of atom.
- It adds up to the atomic mass number of atoms.
What is neutron?
- Neutron is neutral charged particles of atom.
- These are posited in the nucleus of atom and it adds up in the mass number of atom.
In the figure below:
- Atomic number of sodium is 11.
- Atomic mass of sodium is 23.
- Number of protons is 11 and number of neutrons is 12 inside the nucleus.
- 11 electrons are revolving around the nucleus in orbits of different energy states.
- Electronic configuration is (2, 8, 1). K-Shell has 2 electrons, L-Shell has 8 electrons and 1 electron in M-Shell.
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