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8 Atoms and Elements
Atoms and elements keywords
Question | Answer |
---|---|
A metal which reacts easily with water. | calcium |
All the atoms in an element are the same. | element |
Elements that are shiny, conduct heat and electricity well, and often have high melting and boiling points. | metals |
Elements that are not shiny, and do not conduct heat and electricity well. | non-metals |
Table that shows all the elements. | Periodic table |
Soft, shiny, reactive, silver-coloured metal. | potassium |
A mixture of different metals. | alloy |
The smallest part of an element you can get. | atom |
A substance that cannot be split up into anything simpler by chemical reactions. | element |
Two or more different substances that are not joined to each other. | mixture |
The letter or letters that represent an element. | symbol |
Something which allows electricity to flow through it easily. | electrical conductor |
Something which allows heat to flow through it easily. | heat conductor |
Temperature where a substance changes from solid to liquid | melting point |
Temperature where a substance changes from liquid to gas | boiling point |
Ways of describing a substance. | properties |
Reflects light well. | shiny |
A yellow, non-metal element. Solid at room temperature. | sulfur |
A combination of symbols and numbers that show how many atoms of different kinds there are in a particular compound. | chemical formula |
Substances that can be split up into simpler substances. | compounds |
Two or more atoms joined together. | molecule |
New chemical formed in a chemical reaction. | product |
Chemicals that join together to form a new substance. | reactants |
Chemical name for common salt. | sodium chloride |