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Chemical elements

alkali metal

noun

a soft, white metal that is a chemical element. Lithium, sodium, and potassium are alkali metals.

arsenic

noun

a very strong chemical that is used in industry and as a poison for killing small animals such as rats

boron

noun

a chemical element that combines with other elements. It is used in nuclear reactors, for making glass, and for making steel hard.

brimstone

noun

an old word meaning ‘sulphur’

bromine

noun

a chemical element that is usually a dark red liquid but can easily change into a gas. It is used in dyes and in making film for taking photographs.

cadmium

noun

a chemical element that is a metal and is used, for example, in making batteries

caesium

noun

a chemical element that is a metal and is used in photoelectric cells

calcium

noun

a white chemical element that is an important part of bones and teeth and is found in some types of rock

carbon

noun

a chemical element that is found in all living things, and can also exist as diamonds or coal

cesium

noun

the American spelling of caesium

fluorine

noun

a chemical element that is a poisonous yellow gas

halogen

noun

a chemical element belonging to a group of five that combine with metals to form salts

magnesium

noun

a chemical element that is a light grey metal. Magnesium burns very brightly and is used in photography and for making fireworks.

the periodic table

noun

a list of chemical elements arranged according to the structure of their atoms

phosphorus

noun

a chemical element, especially a form called white phosphorus that starts to burn by itself when air touches it

selenium

noun

a chemical element that is not a metal and that your body needs in small amounts in order to be healthy

sodium

noun

a chemical element that is a silver-white metal, usually found combined with other chemicals

sulfur

the American spelling of sulphur

sulphur

noun

a yellow chemical element that has a strong smell, used for making medicines and explosives

tin

noun

a soft light silver metal, often used for covering iron or steel. Tin is a chemical element.

titanium

noun

a strong light and expensive white metal that is a chemical element

trace element

noun

a chemical element that a living thing needs in only extremely small amounts in order to grow and develop normally, for example iron or zinc

trace element

noun

a chemical element that is found in extremely small amounts in a mineral

uranium

noun

a chemical element that is a metal and is used for producing nuclear energy because it is radioactive

zinc

noun

a chemical element that is a blue-white metal

sandwich generation

a generation … who are balancing working life with caring for both their teenage children and elderly parents

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Open Dictionary

dish

to gossip or share personal information with someone …

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