Unit 5.1

Question 1

What is the charge of a proton?

Answer 1

+1

Question 2

What is the charge of a neutron?

Answer 2

0

Question 3

What is the charge of an electron?

Answer 3

-1

Question 4

What is the mass of a proton?

Answer 4

Heavy

Question 5

What is the mass of a neutron?

Answer 5

Heavy

Question 6

What is the mass of a electron?

Answer 6

Almost zero

Question 7

Where are the protons located?

Answer 7

In the nucleus

Question 8

Where are the neutrons located?

Answer 8

In the nucleus

Question 9

Where are the electrons located?

Answer 9

Outside of the nucleus

Question 10

What is the role of the proton?

Answer 10

Determines the identity of the atom

Question 11

What is the role of the neutron?

Answer 11

Holds the protons together in the nucleus.

Question 12

What is the role of the electron?

Answer 12

Responsible for reactivity.

Question 13

What is the definition of isotope?

Answer 13

Different atoms of the same element.

Question 14

Which charges attract each other and which ones repel?

Answer 14

Repel = Positive Positive, Negative Negative
Attract = Negative Postive

Question 15

What is the relationship between coulombic attraction and amount of charge?

Answer 15

Direct. If the attraction increases then so will the charge by the same amount.

Question 16

What is the relationship between coulombic attraction and distance?

Answer 16

It is the inverse related to the distance squared. This means you take the inverse of the number then square it.

Question 17

What is the definition of electronegativity?

Answer 17

The tendency of an atom to attract to the electrons in a molecule.

Question 18

An atom with 16 protons, 16 neutrons, and 18 electrons would be an atom of what element?

Answer 18

Sulfur

Question 19

An atom with 16 protons, 16 neutrons, and 18 electrons would have an atomic mass of what?

Answer 19

32

Question 20

An atom with 16 protons, 16 neutrons, and 18 electrons would have a net ionic charge of what?

Answer 20

-2

Question 21

An atom with 11 protons, 12 neutrons, and 10 electrons would be what element?

Answer 21

Sodium

Question 22

An atom with 11 protons, 12 neutrons, and 10 electrons would have an atomic mass of what?

Answer 22

23

Question 23

An atom with 11 protons, 12 neutrons, and 10 electrons would have a net ionic charge of what?

Answer 23

+1

Question 24

An atom of Calcium has an atomic mass of 41 and a net charge of +2 has how many protons?

Answer 24

20

Question 25

An atom of Calcium has an atomic mass of 41 and a net charge of +2 has how many neutrons?

Answer 25

21

Question 26

An atom of Calcium has an atomic mass of 41 and a net charge of +2 has how many electrons?

Answer 26

18

Question 27

Why can isotopes be useful for scientific research?

Answer 27

They can track radioactivity

Question 28

Will the attraction for valence electrons be higher for lithium or oxygen? Why?

Answer 28

Oxygen because there are more protons in the nucleus

Question 29

Will the attraction for valence electrons be higher for lithium or potassium? Why?

Answer 29

Lithium, the valence electrons are in a lower energy level and closer to the nucleus.

Question 30

Which molecule has a higher electromaginificy: A molecule with 5 protons and 1 electron or a molecule with 2 protons and 1 electron?

Answer 30

The first molecule