Study Buddy: Atomic Structure and Nuclear Chemistry
Development of the Modern Atomic Theory
Scientist
Experiment
Findings
Limitations
Model
Democritus
Dalton
Thomson
Rutherford
Chadwick
Bohr
Modern
Atom
Identify the proton, electron, neutron
in the model below.
Parts of an Atom (8th Grade Review)
Sub-atomic Particle
Location
Charge
Mass
_________
+
+
Nuclear Symbol
Carbon-14
__
__
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C
Protons:
Neutrons:
Atomic Number:
Mass Number:
_________
_________
_________
_________
SCIE_CHEM_ATOMIC_MAT_STUDYBUDDYSE_AL
_______
________
What is the atomic number of the
above models? ____
What is the atomic_ mass? _______
What element is this? _______
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Complete the Venn diagram below stating similarities and differences in the numbers of the
subatomic particles for the same element.
Magnesium-24
24
12𝑀𝑔
Magnesium ion
24
2+
12𝑀𝑔
Magnesium-25
25
12𝑀𝑔
Types of Nuclear Radiation
Type
Composition
Symbol
Penetration/Energy
Reaction Example
Alpha
Beta
Gamma
Reaction Type
Definition
Diagram
Uses
Fission
Fusion
Balance the following nuclear equations:
58
0
4
______ → 224
28𝑁𝑖 → −1𝑒 + ______
86𝑅𝑛 + 2𝐻𝑒
12
6𝐶
→ 00𝛾 + _____
Element X has two common isotopes, 79X (50.7%) and 81X (49.3%). What is the average atomic
mass of element X? Identify element X.
Copper occurs naturally as Copper-63 and Copper-65. Which Based on the atomic mass on the
periodic table, which isotope is more abundant?
Why can chemists not simply round off atomic mass to the nearest whole number and say that
would be the mass of the most abundant isotope?
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