BOHR DIAGRAMs

Bohr Diagrams are visual representations of the arrangement of electrons in an atom, showing the nucleus and the energy levels (or shells) where electrons reside.

The first energy level can hold a maximum of 2 electrons.

The second energy level can hold a maximum of 8 electrons.

Valence electrons are the electrons in the outermost shell of an atom that are involved in chemical bonding.

Carbon has 4 valence electrons.

Periods on the periodic table represent horizontal rows, indicating the number of energy levels in the atoms of the elements.

Silicon (Si) has 14 electrons.

The atomic number of Lithium is 3, indicating it has 3 protons and 3 electrons.

Argon has 18 protons.

The electron configuration of Sodium is 1s² 2s² 2p⁶ 3s¹.