This is how fluorine appears in the periodic table.

A green box has F at the center and 9 above. Below it says fluorine and below that 19.00. A blue arrow points to 9.

What information does "9” give about an atom of fluorine? Select three options.

the atomic number
the atomic mass
the number of protons
the number of electrons
the number of neutrons

A: the atomic number

C: the number of protons

D: the number of electrons

1. the atomic number

3. the number of protons

4. the number of electrons

Explanation:

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we can conclude that the melting point of table salt is above room temperature (it's actually 801 deg c). the melting point of mercury must be below room temperature (- 39 deg c).