Term
|
Definition
| An arrangement of the elements in order of increasing atomic number, with chemically similar elements occurring in the same main vertical columns (groups). |
|
|
Term
|
Definition
| A vertical column of elements in the periodic table. |
|
|
Term
|
Definition
| A horizontal row in the periodic table. |
|
|
Term
|
Definition
| Shiny, malleable and ductile elements found on the left of the periodic table. They all conduct electricity. |
|
|
Term
|
Definition
| Non-conducting elements (except carbon graphite) found on the right of the periodic table. |
|
|
Term
|
Definition
| Metals in Group 1 of the periodic table (Li, Na, K, Rb, Cs,Fr). |
|
|
Term
|
Definition
| An element in Group 7 of the periodic table (F, Cl, Br, I, At). |
|
|
Term
|
Definition
| An element in Group 0 of the periodic table (He, Ne, Ar, Kr, Xe, Rn). |
|
|
Term
|
Definition
| The smallest part of an element that can exist. It has a nucleus of protons and neutrons surrounded by moving electrons. |
|
|
Term
|
Definition
| The extremely small centre of an atom where the protons and neutrons are found. |
|
|
Term
|
Definition
| A particle found in the nucleus of an atom. It has a single positive charge and the same mass as a neutron. |
|
|
Term
|
Definition
| A particle found in the nucleus of an atom. It has the same mass as a proton but no charge. |
|
|
Term
|
Definition
| A particle that moves around the nucleus of an atom. It has a single negative charge but its mass is negligible compared to that of a proton or neutron. |
|
|
Term
|
Definition
| The number of protons in the nucleus of an atom. |
|
|
Term
|
Definition
| The total number of protons and neutrons in the nucleus of an atom. |
|
|
Term
|
Definition
| A substance which cannot be broken down into simpler substances by chemical means. All of its atoms have the same atomic number. |
|
|
Term
|
Definition
| A substance with two or more elements chemically joined together. |
|
|
Term
|
Definition
| A pair or group of atoms held together by bonds. |
|
|
Term
|
Definition
| A molecule that contains only two atoms, for example H2 and HCl |
|
|
Term
|
Definition
| Shows the number of atoms of each element in a molecule or the number of ions in a compound. For example: CO2 and CaCl2 |
|
|
Term
|
Definition
| Greek prefix used to indicate that there is one atom of a particular element e.g. carbon monoxide CO |
|
|
Term
|
Definition
| Greek prefix used to indicate that there are two atoms of a particular element e.g. carbon dioxide CO2 |
|
|
Term
|
Definition
| Greek prefix used to indicate that there are three atoms of a particular element e.g. sulfur trioxide SO3 |
|
|
Term
|
Definition
| Greek prefix used to indicate that there are four atoms of a particular element e.g. carbon tetrachloride CCl4 |
|
|
Term
|
Definition
| Greek prefix used to indicate that there are five atoms of a particular element e.g. phosphorus pentachloride PCl5 |
|
|
Term
|
Definition
| Greek prefix used to indicate that there are six atoms of a particular element e.g. xenon hexafluoride XeF6 |
|
|
Term
|
Definition
| Greek prefix used to indicate that there are seven atoms of a particular element e.g. iodine heptafluoride IF7 |
|
|
Term
|
Definition
| Greek prefix used to indicate that there are eight atoms of a particular element |
|
|
Term
|
Definition
| A compound with this name ending usually contains two elements e.g. sodium chloride contains sodium and chlorine NaCl |
|
|
Term
|
Definition
| A compound with this name ending usually contains two elements and oxygen e.g. sodium chlorate contains sodium, chlorine and oxygen NaClO3 |
|
|
Term
|
Definition
| A chemical process in which one or more new substances are formed |
|
|
Term
|
Definition
| The chemical(s) at the start of a chemical reaction. Found on the left-hand side of an equation. |
|
|
Term
|
Definition
| The new substance(s) formed during a chemical reaction. Found on the right-hand side of the equation. |
|
|
Term
|
Definition
| Use of words to show the reactants and the products during a chemical reaction, for example: |
|
|
Term
| chemical/formula equation |
|
Definition
| Uses chemical formulae to show the reactants and products during a chemical reaction, for example: Mg + O2 ->MgO |
|
|
