Exploring Ions and Isotopic Notation

This video tutorial covers the concept of ions, which are atoms with a positive or negative charge due to an imbalance of protons and electrons. It explains isotopic notation, a method to represent ions, and provides practice problems to reinforce understanding. The tutorial includes detailed examples with elements like magnesium, arsenic, and calcium, and concludes with advanced problems involving isotopic notation for iron and other elements.

What is an ion?

• A molecule

• A proton

• An atom with a charge

• A neutral atom

What causes an atom to become an ion?

• Absence of electrons

• Presence of neutrons

• Imbalance of protons and electrons

• Equal number of protons and electrons

In isotopic notation, where is the charge of an ion indicated?

• Top right corner

• Bottom left corner

• Top left corner

• Bottom right corner

What is the atomic number of carbon?

• 6

• 8

• 14

• 12

If a carbon atom has 6 protons and 8 electrons, what is its charge?

• -1

• -2

• +2

• +1

How many protons does magnesium have if its atomic number is 12?

• 24

• 14

• 12

• 10

If an arsenic atom has 33 protons and a charge of -3, how many electrons does it have?

• 39

• 36

• 33

• 30

What is the mass number of a calcium atom with 20 protons and 21 neutrons?

• 42

• 41

• 21

• 20

If an atom has an atomic number of 41, what element is it?

• As

• Nb

• Ca

• Fe

An iron atom has 84 total subatomic particles. If it has 26 protons, how many neutrons does it have?

• 26

• 84

• 58

• 32