Flashcards
2.1 Atoms
Flashcards do conjunto (20)
- 1What is an element?A substance made up of one type of atom.
- 2What is a compound?A subtance that is made from one or more types of atoms
- 3What is a neutron?A subatomic particle with no charge and the same mass as protons.
- 4What is an ion?An atom or molecule with a net electric charge due to the loss or gain of one or more electrons.
- 5What is an atomic number?The number of protons in the nucleus of an atom.
- 6What is mass number?The total number of protons and neutrons in a nucleus.
- 7What is a cation?A positively charged ion,
- 8What is a nucleus?The cluster of protons and neutrons at the centre of an atom.
- 9What is an electron cloud?The area occupied by electrons.
- 10What is a lattice?Large grid-like structure.
- 11What is electrostatic attraction?Attracts electrons to the nucleus
- 12What is electrostatic repulsion?Makes protons repel each other.
- 13What is the force that holds protons together in the nucleus?Nuclear Force
- 14What is the charge of a proton?Positive
- 15What is the charge of an electron?Negative
- 16Where is the location of protons and neutrons?In the nucleus
- 17What are molecules?Clusters of atoms
- 18How many known types of atoms are there?!!8 known types
- 19How many are found naturally?98 occur in nature.
- 20How many must be made in a laboratory?20 types
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- Year 8 Sciences FlashCards sobre 2.1 Atoms, criado por Hafsa Ali em 06-05-2019.
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- Hafsa Ali
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