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A metal atom that loses electrons is called a/an .

It is called ions

Explanation:

Metal atoms lose some of their valence electrons through a process called oxidation, resulting in a large variety of ionic compounds including salts, sulfides, and oxides. The properties of metals, combined with the chemical action of other elements, results in the transfer of electrons from one atom to another.

number of molecules / avogadro's number * molecule molecular = mass

explanation:

we define a gram-molecular weight as the mass of one mole of any element or compound. a mole contains avogadro's number of units (molecules) –  

6.022

x

10

23

. so, dividing the number of molecules by avogadro's number gives us the number of moles. multiplying that by the molecular weight gives us the mass. from the periodic table we find the gram-molecular weight of u to be238 and of f to be19. so,  

u

f

6

will have a gram-molecular weight of 352g.