Question

The table below gives the numbers of protons, electrons, and neutrons in four atoms.

Atom
1
2
3
4
Based on the table, which atom has a charge of -1?
1
2
Number of protons
9
9
9
19
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Number of neutrons
8
9
9
10
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Number of electrons
9
8
10
9
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Answer 1

Answer: Atom 3 has charge = -1

Step-by-step explanation:

As we know, charge of electron is -1, charge of proton is +1 and charge of neutron is 0.

Here, In Atom 3, Charge = 9*(+1) + 9*(0)+ 10*(-1) = 9-10 = -1

Therefore, Atom 3 has charge = -1