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finessa's crossword puzzle

Across
A part or atspect of something
The basic unit of a chemical element
The forming base of it's activity
The total number of protons and neutrons in a nucleus
An element that is not metal
React with water
The number of protons in a nucleus of an atom
Two or more signs of the same element
Also known as a family
Down
Present in all atomic nucleic expcept those ordinary hydrogen
Is the average of a proton
In order to form a shared pair
Oppsite signs
Salts can be made
Any gaseous elements
A solid material
They are very reactivity
Found in all atoms
In a horizontal line
Lost or a gain of one or more electrons