Question

Plz answer all 3.
in the 19th century a scientist called john dalton used symbols to represent atoms.the symbols he used for atoms of three different elements are shown below...
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Answer 1

Answer:

+,-

Explanation:

eletron(-),protron(+)

Answer 2

Answer:

Elements are substances like (hydrogen, oxygen) that can't be split into simpler substances. A substant like water, that is made up of two or more element is called compound. A mixture is made up of two or more substances which are physically combined is called mixture.

Explanation:

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