ATOMIC STRUCTURE
1. What are the 3 subatomic particles of an atom?
2. Give the symbol and charge for each of the particles.
3. Where is each particle located in the atom?
4. What does electrically neutral mean? (state it 2 different ways)
5. How do you find the number of protons in the nucleus of an atom?
6. How do you find the mass number?
7. How do you find the number of neutrons in the nucleus of an atom?
Atomic
Number
1
Complete the following table for NEUTRAL ATOMS:
Element
Symbol
Mass
Protons
Number
1
Electrons
Ga
Boron
Neutrons
39
11
36
28
K
47
14
20
ISOTOPES
1. Define isotope.
2. How are isotopes the same?
3. How are isotopes different?
4. What are the 3 isotopes of hydrogen?
5. Determine the number of neutrons for the following:
Chlorine-37, chlorine-39, chlorine-40
WRITING NUCLIDE SYMBOLS
1. How do you write a nuclide symbol?
2. Write the nuclide symbol for the following:
Carbon-12
carbon-13
copper-63
copper-65
3. How are the isotopes of carbon the same? How are they different?
4. How are the isotopes of copper the same? How are they different?
WRITING NUCLIDE NAMES
1. How do you write nuclide names?
2. Write the nuclide name for each of the following:
234
U
92
235
U
92
23
Na+
11
16
O
8
238
U
92
22
Na
11
18 2O
8
3. How many neutrons does each isotope have?
BOHR DIAGRAMS
1. Draw Bohr Diagrams for the following:
Hydrogen
Argon
Chlorine
Nitride ion
Calcium ion
Boron ion
2. How many valence electrons does each of the above atoms or ions have?
VALENCE ELECTRONS
1. What are valence electrons?
2. How do you know how many valence electrons an element has?
3. How many valence electrons does each of the following have?
Hydrogen
Neon
Silicon
Arsenic
Calcium
Lithium
Phosphorus
Aluminum
4. Write the ion symbol for each of the elements above.
IS IT AN ANION OR CATION?
1. What is an anion?
2. What is a cation?
3. Determine whether the following are anions, cations, or neutral:
H+
He2
I-
Ag+
O2
O2-
N3-
Mg2+
4. How do you know it is an anion, cation, or neutral?
5. What is the charge of each of the above ions or atoms?
WRITING NAMES OF IONS
1. How do you write the name for cations?
2. How do you write the name for anions?
3. Write the name for each of the following:
H+
Al3+
B3+
I-
Ag+
As3-
S2-
O2-
Na+
F-
N3-
Mg2+
DIMENSIONAL ANALYSIS
1. Joanie skateboards 3.2 miles across town to get to her friend’s house. How many
inches is this?
2. A thirsty antelope drinks 2.15 gallons a day. How many liters is this?
3. Johhny rollerblades on the boardwalk at 12 mph. How many meters per second is
this?
CALCULATING ATOMIC MASS
1. Look at the table of values of the isotopes of argon. Which value do you think the
average atomic mass of argon will be closest to? Why?
2. There are 3 isotopes of argon with the following isotopic masses.
Calculate the average atomic mass of Argon?
Isotope
Argon-36
Argon-38
Argon-40
Mass of Isotope
35.97 amu
37.96 amu
39.96 amu
% Abundance
0.337%
0.063%
99.60%
CALCULATING PERCENT ABUNDANCE
Calculate the % abundance for each of the isotopes of copper; the average atomic mass of
Copper is 63.55 amu.
Isotope
Copper-63
Copper-65
Mass of Isotope
62.93 amu
64.93 amu
% Abundance