Chemistry revision - The period table and elements

Metals

Elements that are generally solid, good conductors of heat and electricity, and are malleable and ductile.

Non-metals

Elements that are generally poor conductors of heat and electricity and are not malleable or ductile.

Periodic Table

A table that classifies elements based on their properties, with metals on the left and non-metals on the right.

Dmitri Mendeleev

A scientist known for creating one of the first periodic tables in the 1800s.

Hydrogen

An element that is a non-metal but is placed in group 1 due to its similar properties to other group 1 elements.

Molecules

Structures formed when two or more atoms chemically bond together.

Compounds

Substances formed when atoms of different elements bond together, represented by formulae that indicate the number of each type of atom.

Reactivity Series

A ranking of metals based on their reactivity, from most reactive (potassium) to least reactive (platinum).