An atom of Oxygen (O #8) has _____ valence electrons

In the configuration, the atom has _____ valence electrons.

The noble gas configuration is for which element?

The orbital diagram is for which element?

In the configuration below, the atom has ____ valence electrons.

The electron configuration is for which element?

Electronegativity INCREASES as you move from the TOP to the BOTTOM within a group of the periodic table.

Ionization Energy means "attractiveness" of an atom for electrons

Electronegativity means the energy required to remove an electron from the atom.

Chlorine is larger than Sodium because they have the same number of shells and Chlorine has more protons, neutrons, and electrons.

Potassium is larger than Calcium because they have the same number of shells but Calcium has one more proton and thus slightly more pull on its electrons than Potassium - causing it to be smaller.

Atomic radius DECREASES as you move from the LEFT to the RIGHT within a period of the periodic table.

Electronegativity DECREASES as you move from the LEFT to the RIGHT within a period of the periodic table.

Atomic radius INCREASES as you move from the TOP to the BOTTOM within a group of the periodic table

Fluorine is higher in electronegativity than Lithium because they have the same number of shells but Fluorine has more protons which allows it's nucleus to exert more pull on electrons in the environment.

Sodium is higher in ionization energy than Francium because it has less shells and thus it protons exert more pull on its outside electrons. This makes it harder for something to remove an electron from Sodium and thus more ionization energy is required.