Question

Which statements about a phosphorus atom are correct?

1. The mass number is 16.

2. The number of outer electrons is 5.

3. The proton number is 15.

Answer 1

Answer:

1. Wrong.its number is 15

2. TRUE

3.True

Answer 2

Answer:

The correct statements are no.2 and 3.

2. The number of outer electrons is 5.

3. The proton number is 15.

The other one are incorrect. Because the mass number of phosphorus is not 16, but 15.

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