7.1 Notes

Multiple Choice

In a stable atom the amount of electrons is equal to the amount of

• neutrons

• protons

• atomic mass

• neutrons + protons

Multiple Choice

What types of charges attract?

• Positive and Positive
• Positive and Neutral
• Negative and Neutral
• Positive and Negative

Multiple Choice

The accumulation of excess electric charge on an object is called

• Static electricity 
• Electric discharge
• Resistance
• Circuit 

Multiple Choice

Electric charges that are alike _______ each other.

• Attract
• Repel

Multiple Choice

If a substance has an excess number of electrons on its surface, what type of charge does it have?

• A negative charge
• A positive charge
• A neutral charge
• A nuclear charge

Multiple Choice

A balloon has a negative charge. A glass rod has a positive charge. What will happen when the rod is brought near the balloon?

• the balloon will be attracted to the rod

• the balloon will remain in place

• the balloon will be repelled by the rod

• the balloon will spin in circles

Multiple Choice

If an object has a net charge of +2e this means it has

• lost 2 electrons
• gained 2 electrons
• lost 2 protons
• gained 2 protons

Multiple Choice

glass, rubber, silk, and plastic are all examples of

• Conductors

• Insulator

• Thermel conductivity

• Materials

Multiple Choice

A metal spoon is an example of _____.

• a conductor
• an insulator

Multiple Choice

Metals such as copper, iron, gold, and silver are ...

• conductors
• brittle
• insulators
• resistors