Periodic table families key terms

What are alkali metals?

Alkali metals are Group 1 elements like lithium, sodium, and potassium. They are very reactive.

What are alkaline earth metals?

These are Group 2 elements including magnesium and calcium. They are less reactive than alkali metals.

What is a noble gas?

Noble gases are Group 18 elements like neon and argon. They are very stable and rarely react.

Difference between metals and nonmetals

Metals are shiny, good conductors, and malleable. Nonmetals are dull, poor conductors, and brittle.

Fill in the blank: Transition metals are found in group ____.

Transition metals are found in group 3 to 12 of the periodic table.

Question: What are halogens?

Halogens are Group 17 elements like fluorine and chlorine. They are very reactive nonmetals.

True or false: All alkali metals are solid at room temperature.

False, because lithium is solid, but cesium can be a liquid at higher temperatures.

What is the main characteristic of metalloids?

Metalloids have properties of both metals and nonmetals. They are found along the staircase line in the periodic table.

Question: What is the periodic trend for reactivity in alkali metals?

Reactivity increases down the group. For example, cesium is more reactive than lithium.

What do we call elements in the same group?

Elements in the same group are called 'families' and share similar chemical properties.

True or false: Noble gases are reactive.

False, because noble gases are very stable and do not easily form compounds.

Which family includes carbon and silicon?

The carbon group, or Group 14, includes carbon (C) and silicon (Si).

Reaction of halogens with metals

Halogens react with metals to form ionic compounds, like sodium chloride (NaCl).

What are the characteristics of alkaline earth metals?

They are shiny, silver-white, and slightly reactive. Examples include magnesium and calcium.