Science, asked by sabinasharma0931, 7 months ago

the mass number of an element is 19 the second sale of its atom contains 7 electron the num:ber protons in its nucleus is

Answers

Answered by Anonymous

2

Answer:

12 protons is the answer

Explanation:

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Answered by alwinjoseph095

0

Answer:

no of protons = mass number - no. of electrons

= 19-7=12

so 12 protons are there

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