Understanding Zinc and Ion Charges

This video tutorial explains how to determine the number of protons and electrons in the Zn2+ ion. It begins by identifying zinc on the periodic table and noting its atomic number of 30, which corresponds to the number of protons. The video then distinguishes between neutral zinc and the Zn2+ ion, highlighting that the difference lies in the number of electrons. For Zn2+, two electrons are lost, resulting in 28 electrons. The tutorial also covers the concept of ion charges, explaining how losing electrons leads to a positive charge.

What is the first step in determining the number of protons and electrons in Zn2+?

• Check the atomic mass of zinc.

• Look at the periodic table for zinc's atomic number.

• Count the number of neutrons in zinc.

• Identify the color of zinc on the periodic table.

What does the atomic number of zinc represent?

• The number of neutrons in zinc.

• The number of protons in zinc.

• The number of electrons in zinc.

• The atomic mass of zinc.

How does the number of electrons in a zinc ion differ from a neutral zinc atom?

• The zinc ion has no electrons.

• The zinc ion has the same number of electrons.

• The zinc ion has fewer electrons.

• The zinc ion has more electrons.

What happens to the charge of an ion when it loses electrons?

• The ion becomes positively charged.

• The ion becomes a different element.

• The ion remains neutral.

• The ion becomes negatively charged.

How many electrons does Zn2+ have?

• 26 electrons

• 30 electrons

• 28 electrons

• 32 electrons

What is the charge of Zn2+ ion?

• Positive

• Negative

• Zero

• Neutral

Why does losing electrons make an ion positive?

• Because electrons are positive.

• Because electrons are negative.

• Because neutrons are gained.

• Because protons are lost.

What is the relationship between protons and electrons in a neutral atom?

• Protons are more than electrons.

• Protons equal electrons.

• Protons are less than neutrons.

• Electrons are more than protons.

What additional resource is provided for finding the number of neutrons in zinc isotopes?

• A video tutorial.

• A book reference.

• A classroom lecture.

• A link in the description.

Who is the presenter of the video?

• Dr. A

• Dr. B

• Dr. C

• Dr. D