Atomic Structure
The negatively charged particles in an atom.
Electrons
Elements are arranged in this order on the periodic table.
By Atomic Number
Atoms of the same element with different numbers of neutrons.
Isotopes
The pH of a neutral substance.
7
This is a sign of a chemical change.
Accept one of: Bubbles, Colour Change, Temperature Change, Odour, Solid forms (precipitate)
The dense central core of an atom made up of protons and neutrons.
Nucleus
The vertical columns on the periodic table.
Groups
The name given to the time taken for half the radioactive elements to decay.
Half-life
The colour universal indicator turns an acid.
Red
A piece of equipment worn to protect the eyes from acid irritation.
Safety glasses/goggles
The positively charged particles in the nucleus of an atom.
Protons
The horizontal rows on the periodic table.
Periods
The name given to spontaneous emission of particles or energy from unstable atomic nuclei.
Radiation
These substances are slippery and bitter.
Base
A type of substance that reacts with an acid to form hydrogen gas.
Metal
How atomic mass is calculated.
Protons + Neutrons
The three categories that elements are divided into on the periodic table.
Metals, nonmetals, semi-metals
The name of the radiation which can be stopped by a piece of paper.
Alpha
These are substances that release hydrogen ions (H+) when dissolved in water
Acid
A type of substance that reacts with an acid to form carbon dioxide, salt and water.
Carbonate
The atomic model proposed by JJ Thompson.
Plum Pudding
The name of the last group on the periodic table.
Nobel Gases
The type of radiation in which an unstable nucleus emits an electron particle.
Beta
These are substances that release hydroxide ions (OH-) when dissolved in water
Base
In this type of reaction, an acid reacts with a base to produce salt and water.
Neutralisation