Flashcards
Atom Test Revision
Cards in this deck (12)
- 1What is an element?An element is any substance that cannot be broken down into simpler substances.
- 2What are rows?They are in the periodic table and are also called 'periods'. They are horizontal.
- 3What are groups?A group is also a column in the periodic table and is vertical
- 4What are valence electrons?Electrons in the outermost shell
- 5What are atoms mostly made up of?empty space
- 6Does an atom have a charge?no
- 7How can you tell the amount of electrons an element has?By the row the element is in
- 8What are molecule?A group of atoms bonded together
- 9What is a bondA strong force of attraction holding atoms together in a molecule
- 10What is a compound?A substance in which two or more different elements are chemically bonded
- 11What is an isotope?Atoms of the same element that have the same number of protons but different number of neutrons
- 12What is the mass number?The amount of protons and neutrons in an atom
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- year 9 Science Flashcards on Atom Test Revision, created by Elli Humphreys on 20/03/2016.
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- Elli Humphreys
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