2.1 Study Guide

Question 1

What is an atomic number?

Answer 1

The amount of protons in an atom’s nucleus

Question 2

What is a mass number?

Answer 2

The amount of protons and neutrons in the atom’s nucleus

Question 3

How much does an electron weigh?

Answer 3

Basically 0. It doesn’t effect mass number

Question 4

How much is a proton and a neutron?

Answer 4

1

Question 5

What charge is a neutron

Answer 5

0

Question 5

What charge is a proton?

Answer 5

positive

Question 6

What charge is a electron?

Answer 6

negative

Question 7

Where is an electron located

Answer 7

The electron cloud outside of the nucleus

Question 8

What are valance electrons?

Answer 8

The electrons located in the outermost level.

Question 9

What is it called when an element has 8 valance electrons

Answer 9

Noble gases

Question 10

What is an isotope?

Answer 10

A form of an element, same amount of protons and electrons, different mass number because there is a different amount of neutrons

Question 11

True or False. Two isotopes will react the same in a chemical reaction

Answer 11

True, because valance electrons are what matter in a chemical reaction, not neutrons

Question 12

What is the atomic number of carbon

Answer 12

6

Question 13

How many valance electrons are in flourine

Answer 13

7

Question 14

How many valance electrons in Boron

Answer 14

3

Question 15

If an element has 8 protons and the mass number is 16, how many neutrons does it have?

Answer 15

8