An atom in the ground state has two electrons in its first shell and six electrons in its second shell. What is the total number of protons in the nucleus of this atom? (1) 5 (2) 2 (3) 7 (4) 8

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Maggie

Chemistry

31 January, 18:13

An atom in the ground state has two electrons in its first shell and six electrons in its second shell. What is the total number of protons in the nucleus of this atom? (1) 5 (2) 2 (3) 7 (4) 8

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Eden York · Answer 1

The answer is (4) 8. The total electrons are two plus six equals eight. And at ground state, the atom does not have charge. So the proton number is 8. One proton has one positive charge.