Chapter 21- The Atom

Question 1

Proton mass and location

Answer 1

1 unit

In the nucleus

Question 2

Electron mass and location

Answer 2

Negligee

Orbiting the nucleus /shell

Question 3

Neutron mass and location

Answer 3

1 unit

Nucleus

Question 4

1 proton =_____ electrons

Answer 4

1,840

Question 5

Top number on an element sign?

Answer 5

Atomic number

Number of protons (= to electrons)

Question 6

Bottom left number on an element sign?

Answer 6

Mass number

Protons+Neutrons (-atomic number to get number of neutrons)

Question 7

Number of electrons in each she’ll

Answer 7

The atomic structure has 2 electrons in the first she’ll and 8 in every other

Question 8

Electronic configuration

Answer 8

Number of electron in each shell separated by commas

Eg. Aluminium’s atomic number is 13
So, it’s electronic configuration is 2,8,3,

Question 9

Isotopes

Answer 9

Same atomic number (protons and electrons)
BUT
Different mass number (Ie. Neutrons have changed)

Question 10

What is in an atom?

Answer 10

Sub-atomic particles
Protons +
Neutrons 0
Electrons -