Unit 2 - Atomic Concepts - Structure of Atoms

Question 1

Definition of Atom

Answer 1

Basic Neutral Unit of Matter

Question 2

Definition of Molecule

Answer 2

Atoms Bonded Together

Question 3

Definition of a Diatomic Element

Answer 3

Elements that will ONLY exist in pairs, not on their own

Question 4

What are 7 examples of Diatomic Elements?

Answer 4

HONClBrIF

H: Hydrogen (H₂)
O: Oxygen (O₂)
N: Nitrogen (N₂)
Cl: Chlorine (Cl₂)
Br: Bromine (Br₂)
I: Iodine (I₂)
F: Fluorine (F₂)

Question 5

Definition of Proton (4)
Charge, Location, Role, Symbol

Answer 5

1. Charge - Positive
2. Location - Atom’s Nucleus
3. Role - # of Protons = Atomic Number
4. Symbol: p+

Question 6

Definition of Neutron (4)
Charge, Location, Role, Symbol

Answer 6

1. Charge - None/Neutral
2. Location - Atom’s Nucleus
3. Role - Make up some of atom’s mass
4. Symbol - n

Question 7

Definition of Electron (5)
Charge, Location, Role, Symbol, Mass

Answer 7

1. Charge - Negative
2. Location - Orbits Nucleus in Energy Levels
3. Role - Responsible for Bonds
4. Symbol - e-
5. Mass - 1/1837, so small = 0

Question 8

Definition of Atomic Number

Answer 8

Number of protons in nucleus

Question 9

Symbol for Atomic Number

Answer 9

Z

Question 10

Definition of Atomic Mass

Answer 10

Number of protons and neutrons in nucleus

Question 11

Symbol and Unit for Atomic Mass

Answer 11

Symbol: A
Unit: amu

Question 12

A
X
Z

Answer 12

A: Atomic Mass
Z: Atomic Number
X: Element

Question 13

Definition of Isotopes (4)

Answer 13

1. Same Element
2. Same Number of Protons
3. DIfferent Number of Neutrons
4. Different Atomic Mass

Question 14

Definition of Average Atomic Mass (2)

Answer 14

1. Found on the PT
2. Weighted Average of ALL naturally occurring Isotopes

Question 15

Table to Determine Average Atomic Mass

Answer 15

Isotope I Mass I Abundance I Product

Elem ( ) ______g 0.00 X
Elem ( ) ______g 0.00 Y
Elem ( ) ______g 0.00 Z