rabetancourt23
Answered

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On the periodic table, why is the mass number expressed as a decimal? *
A-All atoms have half of a proton or half of a neutron in the nucleus, so decimals are necessary
B-Scientists are obsessed with small facts, so they measure atoms masses with tiny scales to get it just right
C-Elements can exist in nature with different numbers of neutrons, so the mass is an average of the isotopes that exist
D-Electrons have a very small mass, so they add decimal points to the mass of an atom.

Sagot :

KaydieD

Answer:

The answer is C because it is an average of the various isotopes of an element.

Explanation:

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