Question

please tell me guys​

Answer 1

Answer:

the number after the element tells how many atoms are there H2 means two hydrogen atoms o2 means 2 oxygen atoms

the number before the element is number of molecules 2-2 means to molecules of hydrogen and for hydrogen atoms to MG means to magnesium molecules

some elements on their go alone most metals for example mg,ca

other elements usually not metal go in pairs H2, O2,S8

it depends on the electrons in the last layer

your answer........................

H=1 Atom of Hydrogen

H2=1 Molecule of Hydrogen

2H=2 Atom of Hydrogen

2H2=2 Molecules of Hydrogen

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Answer 2

Answer:

hydrogen-H

molecule of hydrogen-H2

hydrogen-2H

molecules of hydrogen-2H2

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