Atomic Structure and Ion Charges

This video tutorial explains how to determine the number of protons and electrons in the phosphide ion (P3-). It begins by examining phosphorus on the periodic table, noting its atomic number of 15, which indicates 15 protons. The video then compares neutral phosphorus with the P3- ion, highlighting that the difference lies in the number of electrons. For the P3- ion, there are three extra electrons, resulting in a total of 18 electrons. The tutorial concludes by explaining how ion charge changes when an atom gains or loses electrons.

What is the charge of the phosphide ion?

• No charge

• Neutral

• Positive

• Negative

What does the atomic number of an element represent?

• Number of ions

• Number of neutrons

• Number of protons

• Number of electrons

How many protons does phosphorus have?

• 18

• 15

• 20

• 12

What is the main difference between neutral phosphorus and the phosphide ion?

• Number of protons

• Number of neutrons

• Number of electrons

• Atomic mass

How many electrons does a neutral phosphorus atom have?

• 12

• 15

• 20

• 18

How many extra electrons does the phosphide ion have compared to neutral phosphorus?

• 3

• 4

• 2

• 1

What is the total number of electrons in the phosphide ion?

• 17

• 15

• 16

• 18

What happens to an atom when it gains an electron?

• It loses a proton

• It remains neutral

• It becomes positive

• It becomes negative

What is the result when an atom loses an electron?

• It gains a proton

• It remains neutral

• It becomes negative

• It becomes positive

Who is the presenter of the video?

• Dr. A

• Dr. B

• Dr. C

• Dr. D