Chapter 8.1 - Electric Charge

Question 1

The most fundamental rule of electrical behavior…

Answer 1

Like Charges Repel; Opposite Charges Attract

Question 2

Why is Charge like a Baton in a Relay Race?

Answer 2

It can be passed from one object to another but can’t be lost.

Question 3

Where do electrical forces comes from?

Answer 3

Particles in Atoms

Question 4

Is the nucleus of an atom positively or negatively charged?

Answer 4

Nucleus is positively charged

Question 5

Are the circling electrons positively or negatively charged.

Answer 5

Electrons are Negatively Charged.

Question 6

All Electrons are what?

Answer 6

Identical: Same mass and same quantity of negative charge.

Question 7

What is a nucleus composed of?

Answer 7

Protons and Neutrons

Question 8

Size of proton compared to electron

Answer 8

Proton is 2000 times bigger than electron

Question 9

Proton’s positive charge compared to magnitude of Electron’s negative charge.

Answer 9

Positive charge of proton is equal in magnitude to the negative charge of electron

Question 10

Neutron’s mass and charge

Answer 10

Neutron has slightly greater mass than proton but no charge

Question 11

How many Electrons vs Protons in an Atom

Answer 11

There are usually the same amount of electrons (negative) as protons (positive) in an atom so it has a zero net charge.

Question 12

What will 2 positive charges do when put in contact?

Answer 12

They will repel one another

Question 13

What will a positive and negative charge do when put in contact?

Answer 13

They will attract one another

Question 14

If an atom has as many electrons as protons, what is the atom’s charge?

Answer 14

It has a net charge of zero (and is neutral) because the total positive charge balances the total negative charge exactly

Question 15

If an electron is removed from a neutral atom, what is the charge of the atom?

Answer 15

The atom is positively charged:

It has one more positive charge (proton) than negative charge (electron)

Question 16

What is a Charged Atom Called?

Answer 16

An Ion

Question 17

Did a Positive Ion gain or lose electrons?

Answer 17

Lost electrons

Question 18

Did a Negative Ion gain or lose electrons?

Answer 18

Gained Electrons

Question 19

Why are Electrons able to continue revolving around the Proton & Neutron Nucleus?

Answer 19

The positive and negative charges of the protons and electrons attract each other

Question 20

What’s the difference between electrons that are close to the nucleus and electrons that are far away from the nucleus?

Answer 20

Electrons that are close to the nucleus are tightly held

The electrons that are farther away are held loosely and can be easily dislodged

Question 21

What determines how much energy it takes to tear an electron away from an atom

Answer 21

It varies depending on the type of substance

Question 22

Are electrons held more tightly in wool & fur or in rubber & plastic

Answer 22

Rubber and Plastic- it takes more energy to tear their electrons away

Question 23

If plastic and wool are rubbed together, whose electrons will transfer to whom?

Answer 23

The wool’s electrons will transfer to the plastic and make the plastic negatively charged; while the wool lost electrons and is positively charged

Question 24

Define and Electrically Charged Object

Answer 24

An object that has unequal numbers of electrons and protons

Question 25

What is an object with more electrons than protons

Answer 25

Negatively Charged

Question 26

What is an object with more Protons than Electrons

Answer 26

Positively Charged

Question 27

What is the Principle of Conservation of Charge

Answer 27

Electrons (or electric charges) are neither created nor destroyed but are simply transferred from one material to another

Question 28

Can electrons be divided?

Answer 28

No - Every object has a charge that is based on a whole-number multiple of the charge of an electron

Question 29

If you scuff electrons onto your shoes while walking across a rug, are you negatively or positively charged?

Answer 29

You are negatively charged because you gained electrons (negative charges)