Flashcards
1.2 Science Terminology: Atoms and Elements
Cards in this deck (11)
- 1ScienceBuzzwords
- 2AtomsA particle that consists of the three sub particles protons, neutrons and electrons, which makes up everything around us.
- 3MoleculesGroups of two or more atoms bonded together.
- 4Diatomic MoleculesMolecules composed of only two atoms of the same or different chemical elements.
Examples include H₂, O₂ etc. - 5ElementsSubstances consisting of atoms that are the same. Chemically the simplest substances so cannot be broken down by chemical methods.
- 6CompoundsA substance that is made of two or more different elements which are chemically bonded together. Examples include CO₂.
- 7MixtureA substance with no chemical bond between the different parts. The parts can be separated using physical methods.
- 8Atomic NumberThe number of protons and electrons present in one atom of an element.
Is also known as proton number. - 9Mass NumberShows how many protons and neutrons are present in an atom. (number of protons + number of neutrons)
Note: protons and neutrons make up an atom's mass, hence "mass" number. - 10IsotopesDifferent atomic forms of the same element, which have the same number of protons but different numbers of neutrons.
- 11Relative Atomic MassHow heavy different atoms are compared with the mass of an atom of carbon 12.
Is symbolised with the symbol A^r.
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- IGCSE Science (Chemistry) Flashcards on 1.2 Science Terminology: Atoms and Elements, created by joanna boroh on 23/11/2019.
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- joanna boroh
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