Year 8 Periodic Table and Atomic Structure

Vocabulary practice flashcards based on the Year 8 Periodic Table and Atomic Structure learning intentions.

Compound

A substance composed of two or more different atoms in a set ratio.

Atom

The smallest unit of an element that retains the properties of that element.

Atomic Number

The number used to determine the total number of protons in an atom of an element.

Isotope

A form of an element defined and identified by its specific number of protons and neutrons.

Planetary Model of the Atom

An atomic model that describes the charge, mass, and location of protons, neutrons, and electrons.

Arrangements of Elements

The different structural forms in which elements can exist, specifically as lone atoms, molecules, or lattices.

Alloy

A substance formed by combining metals (or metals with other elements) characterized by a specific metallic structure.

Chadwick

The scientist who provided experimental evidence for the existence of the neutron.

Mendeleev

The scientist who pioneered the development of the Periodic Table using key elemental features.

Mosely

The scientist who played a fundamental role in the further development and refinement of the Periodic Table.

Groups and Periods

The organizational categories of the Periodic Table consisting of columns (groups) and rows (periods).

Atomic Radius

A periodic property measuring the size of an atom that shows predictable trends across a period and down a group.

Flame Test

A diagnostic procedure used to qualitatively identify certain metals based on emitted color.

Qualitative Gas Tests

Specific experimental tests used to confirm the presence of gases such as hydrogen gas and oxygen gas.