类别 全部 - isotopes - molecules - elements - ions

作者:yeo peifang 17 年以前

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Molecules & Ions

Molecules & Ions

Molecules & Ions

Ions

Negative Ions
Gain electrons
Positive Ions
Loss electrons
Form from ionic bonding between metals and non-metal
Transfer of electrons

Matter

Pure compounds
Elements

Made up of atoms of the same type

Compounds

Produced by chemical reaction

Constant constituent

Different from those of its constituent elements

Made up of atoms of different type

Mixtures
Homogenous

Example: Ink

Hetrogenous

Example: Salad

Separate by physical method

Molecules

Form from covalent bonds between non-metals
Sharing of electrons

Atom

Electrically neutral
Contain 3 basic particles
Negative electrons
Neutral neutrons
Positive protons
smallest particles of any element
Made up matter
Isotopes
Atom of the same type

Different number of neutrons

Same number of protons