GENERAL KNOWLEDGE

Detailed explanation-1: -Most of the elements important in biology need eight electrons in their outermost shell in order to be stable, and this rule of thumb is known as the octet rule. Some atoms can be stable with an octet even though their valence shell is the 3n shell, which can hold up to 18 electrons.

Detailed explanation-2: -The outermost shell in an atom cannot have more than eight electrons even if it has a capacity to take up more electrons. This is also called the octet rule.

Detailed explanation-3: -Electrons that are in the outermost energy level of an atom are called valence electrons. The position of an element within a period can help to determine the element’s electron configuration and number of valence electrons.

Detailed explanation-4: -The maximum number of electrons that can be accommodated in the outermost orbit is 8.

Detailed explanation-5: -Each shell can contain only a fixed number of electrons: the first shell can hold up to two electrons, the second shell can hold up to eight (2 + 6) electrons, the third shell can hold up to 18 (2 + 6 + 10) and so on.