Ion Charges and Atomic Numbers

The video tutorial explains how to calculate the number of protons and electrons in various ions, including Nickel 2+, Sulfur 2-, Bromine -, and Chromium 3+. The instructor provides step-by-step examples, highlighting the importance of atomic numbers and charge in determining the number of protons and electrons. The video concludes with a brief summary and encouragement for further learning.

What is the main focus of the video tutorial?

• Determining the number of protons, electrons, and neutrons in atoms.

• Learning about chemical reactions.

• Understanding the periodic table.

• Calculating the number of protons, electrons, and neutrons in ions.

How many protons does a nickel ion with a 2+ charge have?

• 26

• 28

• 30

• 32

For a nickel 2+ ion, how many electrons are present?

• 24

• 26

• 28

• 30

What is the atomic number of sulfur?

• 16

• 15

• 14

• 17

How many electrons does a sulfur 2- ion have?

• 16

• 14

• 20

• 18

What is the atomic number of bromine?

• 37

• 35

• 33

• 39

How many electrons are in a bromine ion with a negative charge?

• 36

• 35

• 37

• 34

What is the atomic number of chromium?

• 28

• 26

• 24

• 22

For a chromium 3+ ion, how many electrons are present?

• 21

• 19

• 20

• 18

What is the charge of a chromium ion with 21 electrons?

• 4+

• 2+

• 3+

• 1+