Week 32 extra credit

What is the charge of an electron?

• A) +1

• B) -1

• C) 0

• D) +2

What is the charge of a proton?

• A) -1

• B) 0

• C) +1

• D) +2

What happens when an electron and a proton get close together?

• They repel each other.

• They form a neutron.

• They attract each other.

• Nothing happens.

What happens when two electrons get close together?

• They attract each other

• They combine to form a neutron

• They repel each other

• Nothing happens

What is the characteristic of a particle that causes it to experience a force in an electric field?

• Mass

• Volume

• Charge

• Density

According to the image, what happens when two particles with opposite charges come into proximity?

• A) They repel each other

• B) They do not interact

• C) They attract each other

• D) They cancel each other out

What is the net charge of an object?

• A) The sum of positive charges only

• B) The sum of negative charges only

• C) The difference between positive and negative charges

• D) The sum of all charges in an object

According to the image, which of the following is true about the atomic number and mass number?

• The atomic number is equal to the number of protons.

• The mass number is equal to the number of electrons.

• The atomic number is equal to the number of neutrons.

• The mass number is equal to the number of protons.

What happens when you rub a balloon on your hair?

• Electrons move from the balloon to your hair.

• Electrons move from your hair to the balloon.

• The balloon loses its overall charge.

• Your hair gains extra protons from the balloon.

When transferring charge by rubbing two objects together, what remains constant?

• The location of the charges

• The number of electrons in each object

• The overall charge of the objects

• The type of charges (positive or negative) on each object