Hendley - Protons, Neutrons, Electrons (WiP)

Hendley - Protons, Neutrons, Electrons

Chemistry - Mr. Hendley

Periodic Table Info

• The top number is the atomic number (Z) and corresponds to the protons.

• The chemical symbol used to represent the element. First letter is always capitalized. Second letter (if present) is lower-case.

• Name of the element.

• The atomic mass is the weighted average of all naturally-occurring isotopes. Decimal because it's a weighted average.

Multiple Choice

What is the atomic number for Copper?

• 29

• 34

• 35

• 63.55

Multiple Choice

What is the atomic mass for Copper?

• 29

• 34

• 35

• 63.55

Atomic Mass Vs. Mass Number

• On the Periodic Table is the Average Atomic Mass.

• If rounded to a whole number, it is called the Mass Number (A).

• The Mass number is needed for calculating protons, neutrons and electrons.

Multiple Choice

What is the mass number for Copper?

• 29

• 63

• 63.55

• 64

Calculating Protons, Neutrons, Electrons

• Protons are equal to the Atomic number.

• To be neutral, electrons are also equal to the atomic number.

• The Mass Number = protons + neutrons

• The Atomic Number = protons

• So, # of neutrons = mass number (A) - atomic number (Z)

Multiple Choice

How many protons does neon have?

• 10

• 20

• 21

• 30

Multiple Choice

How many neutrons does neon have?

• 10

• 20

• 21

• 30

Multiple Choice

How many neutrons does aluminum have?

• 13

• 14

• 26.98

• 27

Multiple Choice

How many electrons does fluorine have?

• 9

• 10

• 19

• 28

Multiple Choice

How many protons does cobalt have?

• 27

• 31

• 32

• 59