GENERAL KNOWLEDGE

Detailed explanation-1: -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.

Detailed explanation-2: -First energy level holds a maximum of two electrons. Second energy level is larger because it is farther away from the nucleus. It holds a maximum of eight electrons.

Detailed explanation-3: -For example, energy level I can hold a maximum of two electrons, and energy level II can hold a maximum of eight electrons. The maximum number depends on the number of orbitals at a given energy level.

Detailed explanation-4: -Explain that the first energy level can only have 2 electrons so the next electron in lithium is on the next (second) level. Explain that neon has 10 protons and 10 electrons. There are 2 electrons on the first energy level and 8 electrons on the second level.

Detailed explanation-5: -Each type of orbital can accommodate a different number of electrons. According to the electron cloud model, the first energy level (numbered 1) only has one s orbital. Therefore, it can only hold a maximum of two electrons. S orbitals are approximately spherical.