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Elements, Compounds and Mixtures

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leanorormosa's version from 2017-06-19 00:19

Definitions

Question Answer
Periodic tableAn arrangement of elements in ascending order of their atomic number.
ElementsCannot be split into two or more simpler substances by chemical means.
CompoundsMade up of 2 or more elements that are chemically combined.
Radicalsgroups of elements having an overall charge.
Mixturemade up of 2 or more elements or compounds that are not chemically combined and can therefore be separated.
Moleculemade up of 2 or more atoms joined together.
AtomThe smallest indivisible particle of an element.
IsotopesAtoms of the same element that have the same atomic number but different mass number.
Allotropeoccorence of the same element in the same state but in different forms.
Ionformed when an atom loses or gains electrons.
Bondsformed when electrons are redistributed among the atoms.
Electrovalent (ionic)involves the transfer of electrons between atoms.
CovalentThe sharing of element between atoms.
Crystalsolid that consists of particles arranged in an orderly and repetitive manner.
CatalystAlters the rate of a reaction.
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Group names

Question Answer
1alkali metals
2alkaline earth metals
7halogens
8noble gases
Elements touching the zigzag linemetalloids
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