CHARACTERISTICS OF SOME CLASSIFIED ELEMENTS

THE ALKALI METALS (Li, Na, K, Rb, Cs, Fr ) IA

1. Shiny, soft, low melting metals.
2. They react rapidly and often violently with water to form products that are highly alkaline or basic.
3. They are never found in nature in the pure state, but only in combination with other elements.

THE ALKALINE EARTH METALS (Be, Mg, Ca, Sr, Ba, Ra) IIA

1. Lustrous, silvery metals.
2. Less reactive than alkali metals.
3. They are never found in nature in the pure state, but only in combination with other elements.

THE HALOGENS (F, Cl, Br, I ) VIIA

1. Corrosive and Non-Metallic.
2. All are found in nature, but only in combination with other elements.
3. Halogen comes from the Greek word halos meaning salt. Halogens commonly form salts.

THE NOBLE GASES (He, Ne, Ar, Kr, Xe, Rn) VIIIA

1. Very low reactivity.
2. He, Ne, Ar don't combine with any other elements, Kr and Xe combine with very few.

TRANSITION METALS / METALS

1. All except Hg are solid at room temperature.
2. Most have a silvery shine.
3. Can be easily shaped (malleable) and drawn (ductile).
4. Are good conductors of heat and electricity.

NON-METALS (C, N, O, P, S, Se; F, Cl, Br, I; He, Ne, Ar, Kr, Xe, Rn)

1. 17 are gases, 1 is liquid, 5 are solid at room temperature.
2. The solid non-metals are brittle.
3. They are generally poor conductors of heat and electricity.

SEMI-METALS (B, Si, Ge, As, Sb, Te, At)

1. Properties between those of metals and non-metals.
2. Most are silvery in appearance.

They are brittle and tend to be poor conductors of heat and electricity