Periodic Groups Explorer

The major families — and why each one behaves the way it does

Part 1 · Interactive Model

Explore the Families

Click a family button (or a colored column) to highlight it. See its group, valence electrons, and why it reacts the way it does.

Alkali Alkaline earth Transition Halogens Noble gases Hydrogen (nonmetal)

Part 2 · Predict Before Reveal

Read the clue about an element or group. Pick the family before the reveal, then lock it in.

Score: 0 / 0

Part 3 · Step-by-Step Machines

Pick an element. The finder reasons from its group to its family and properties.

Element:

Pick a family. The rater explains why it is reactive or inert from its valence electrons.

Family:

Compare two elements in the same group. See how reactivity changes going down.

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Part 4 · Ten-Question Quiz

Question 1 of 10 · Score: 0

Group / family: A vertical column on the periodic table; elements in it share similar properties.
Alkali metals: Group 1 (not hydrogen); one valence electron and extremely reactive.
Alkaline earth metals: Group 2; two valence electrons and quite reactive, though less than group 1.
Transition metals: Groups 3–12; hard, shiny metals with varied valence and lower reactivity.
Halogens: Group 17; seven valence electrons and very reactive nonmetals.
Noble gases: Group 18; full valence shells make them inert (unreactive).
Valence electrons: Outer-shell electrons that decide how an element reacts.
Reactivity: How easily an element gains, loses, or shares electrons to reach a full shell.