Q3. Briefly answer any two (2) of the following. i) How Mendeleev's periodic table was different from Henry Moseley's periodic table? ii) Why isotopes exhibit nearly identical chemical properties? iii) Why elements of group 8 are called "Noble Gases "or inert gases?

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Atomic Structure

The basic structure of an atom is defined as the component-level of atomic structure of an atom. Precisely speaking an atom consists of three major subatomic particles which are protons, neutrons, and electrons. Many theories have been stated for explaining the structure of an atom.

Shape of the D Orbital

Shapes of orbitals are an approximate representation of boundaries in space for finding electrons occupied in that respective orbital. D orbitals are known to have a clover leaf shape or dumbbell inside where electrons can be found.