Group 1, 2, 17, 18 + Periods 2 and 3

Alkali Metals, Alkaline Earth Metals, Halogens, Noble Gases, periods 2 and 3 Elements

These elements are important for understanding reactivity trends in atomic radius and ion formation. What are the Alkali Metals?

Lithium (Li), Sodium (Na), Potassium (K), Rubidium (Rb), Caesium (Cs) and Francium (Fr)

These elements are useful for learning about ionic compounds and flame tests. What are the Alkaline Earth Metals?

Berylium (Be), Magnesium (Mg), Calcium (Ca), Strontium (Sr), Barium (Ba), and Radium (Ra).

These elements are inert, stable and not easily changed. What are the Noble Gases?

Helium (He), Neon (Ne), Argon (Ar), Krypton (Kr), Xenon (Xe) and Radon (Rn).

These elements are key for reactions with metals and organic chemistry basics. what are the Halogens?

Fluorine (F), Chlorine (Cl), Bromine (Br), Iodine (I), and Astatine (At).

Commonly used in examples and reactions in introductory chemistry, what are the period 2 and 3 elements?

Period 2:

Lithium (Li), Berylium (Be), Boron (B), Carbon (C), Nitrogen (N), Oxygen (O), Fluorine (F) and Neon (Ne).

Period 3:

Sodium (Na), Magnesium (Mg), Aluminum (Al), Silicon (Si), Phosphorus (P), Sulfur (S), Chlorine (Cl), and Argon (Ar).