Exploring the World of Ions and Their Charges

The video explains the concept of ions, which are atoms or groups of atoms with a charge due to an imbalance between protons and electrons. It provides examples using sodium and oxygen to illustrate how atoms can become positively or negatively charged, forming cations and anions, respectively. The video also introduces polyatomic ions and offers mnemonic devices to remember the terms.

What is an ion?

• A proton with a negative charge

• A molecule with a neutral charge

• An atom or group of atoms with an electrical charge

• An atom with no charge

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Which particles in an atom have a positive charge?

• Neutrons

• Electrons

• Ions

• Protons

What happens when an atom gains or loses electrons?

• It becomes an ion

• It becomes a different element

• It becomes a molecule

• It becomes neutral

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What is the charge of a sodium ion (Na+) after losing one electron?

• +2

• +1

• -1

• 0

What do we call an ion with a positive charge?

• Polyatomic ion

• Cation

• Anion

• Neutral ion

How many electrons does a neutral oxygen atom have?

• 12

• 10

• 8

• 6

What is the charge of an oxygen ion (O2-) after gaining two electrons?

• -1

• +1

• -2

• +2

What do we call an ion with a negative charge?

• Polyatomic ion

• Cation

• Neutral ion

• Anion

What is a polyatomic ion?

• A proton with a charge

• A group of atoms with a charge

• A single atom with a charge

• A neutral molecule

Tags

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How can you remember that a cation is positively charged?

• Cats have paws

• Cats have claws

• Cats are negative

• Cats are neutral