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8E Periodic Table

Key words

TermDefinition
Atom Small particle from which al substances are made
Compound Two or more different atoms joined together by chemical bonds
Element A type of atom
Matter Something that takes up space
Oxidiser A substance that supplies oxygen for a reaction
Chemical reaction A change in which new substances are formed
Physical reaction A change in which no new substances are formed
Chemical formula The element symbols and their numerical ratios of a substance
Alkali metal Group 1 reactive metals
Group Vertical column of the Periodic Table
Periodic Table List of known elements in order of atomic number
Atomic number Number of positive protons in the nucleus
Mass number Number of protons and neutrons in the nucleus
Proton Positive particle in the nucleus
Neutron Neutral particle in the nucleus
Electron Negative particle in the nucleus (no relative mass)
Period Row in the Periodic Table
Halogen Group 7 of the Periodic Table
Noble gas Group 0 unreactive non-metal gases with full electron shells
Boiling Turning from a liquid to a gas throughout the liquid
Evaporation Turning from a liquid to a gas at the surface of the liquid
Brittle Not flexible, breaks under force
Melting Turning from a solid to a liquid
Freezing Turning from a liquid to a solid
Flexible Can bend without breaking
Malleable Can be beaten into shapes
Metal Element that is shiny, conducts heat and electricity, malleable, flexible and high mp
Non-metal Element that is not shiny, does not conduct heat and electricity
Transition metal The central group of elements in the Periodic Table
Acid A substance that releases hydrogen ions in solution (H+)
Alkali A substance that releases hydroxide ions in solution (OH-)
Oxide A compound of a metal or non-metal and oxygen
pH The concentration of hydrogen ions in solution on a scale in multiples of 10 from 1 to 14
Indicator A substance that changes colour under different pH
Reactivity How quickly or vigorously something reacts
Created by: andrewweng0406
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