The Atom

Question 1

How would you write a Nuclear Symbol?

What is the Nuclear Symbol of Carbon?

Answer 1

• Superscript - (Whole) mass number
• Subscript - Atomic number
• Letter Symbol - Symbol of element

12/6 C

Question 2

What are the charges of subatomic particles?

Answer 2

• Neutron (n) - Uncharged (neutral)
• Proton (p+) - Positively charged (+1)
• Electron (e-) - Negatively charged (-1)

Question 3

What does the atomic number indicate?

Answer 3

An atom’s number of protons

Question 4

What does an atom’s mass number indicate?

Answer 4

Sum of Protons and Neutrons

Question 5

How can you find the amount of Neutrons in an atom?

Answer 5

Mass number - Atomic number

Question 6

How can you find the Electron Number in a Neutral Atom?

Answer 6

Equal to protons

Question 7

How can you find the Electron Number in a Positive Ion?

Answer 7

Subtract charge number from Proton number

i.e. an atom with a 17 Protons and a charge of (+2) will have 15 Electrons

Question 8

How can you find the Electron Number in a Negative Atom?

Answer 8

Add charge number to Proton number

i.e. an atom with 17 Protons and a charge of (-2) will have 19 Electrons

Question 9

What are Isotopes?

Answer 9

• Atoms that have lost or gained neutrons
• They have the same proton/electron # as a neutral atom but different neutron #

Question 10

How many electrons does each atomic ring hold in a Bohr Model?

Answer 10

• 1st Ring: 2 electrons max
• 2nd Ring: 8 electrons max
• 3rd Ring: 8 electrons max
• 4th Ring: Holds many (no more than 2 for GT Chem)