Help what is a b c please I want help this my quiz quick

1 answer:

4 0

Answer:

A= sum(mass*percent abundance)

M 100

=(23.985*78.70)+(24.946*10.13)+(25.983*11.17)/100

= 24.3

2. The element is Magnesium.

3. 2412Mg,2512Mg and 2612Mg

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