Periodic Table Review

What is the name of Group 1 on the periodic table

Alkali Metals — typically form +1 ions

What is the name of Group 17

Halogens — highly reactive nonmetals, typically form –1 ions

Which group is the most stable and unreactive

Group 18 – Noble Gases, with full valence shells (no common ion charge)

What charge does an atom of magnesium (Mg) usually form

+2 → Mg²⁺

What do atoms in Group 16 usually do to become stable

Gain 2 electrons → form –2 ions (like O²⁻ or S²⁻)

What happens to atomic radius as you move left to right across a period

It decreases — more protons pull electrons in tighter.

What happens to ionization energy as you move down a group

It decreases — outer electrons are farther from the nucleus, easier to remove.

Which side of the periodic table has metals

Left and center — most metals are found there (e.g., Groups 1–12).

What type of elements lie along the "stair-step" line

Metalloids — they have properties of both metals and nonmetals.

Which element is the most electronegative

Fluorine (F) — it attracts electrons the most strongly.