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lozanna [386]
3 years ago
8

What is the mass number of an atom?

Chemistry
2 answers:
Helen [10]3 years ago
4 0

Answer:

it’s total number of protons and neutrons

Gennadij [26K]3 years ago
3 0
The mass number of an atom is its total number of protons and neutrons. Atoms of different elements usually have different mass numbers , but they can be the same. For example, the mass number of argon atoms and calcium atoms can both be 40.
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3 years ago
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What is the concentration of OH− and pOH in a 0.00072 M solution of Ba(OH)2 at 25 ∘C? Assume complete dissociation.
Mumz [18]

Given :

0.00072 M solution of Ba(OH)_2 at 25^oC .

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3 0
3 years ago
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4 years ago
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