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Rewiew+Workshop(Exam) 7th (2)

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MID – TERM EXAM
REVIEW WORKSHOP
CHEMISTRY
7th
INTRODUCTION
In this document you will find questions and exercises on the topics that will be evaluated in the MID – TERM EXAM.
TOPICS
1. Atomic Structure
2. Isotopes
3. Atomic representation (Bohr’s Model)
4. Electron configuration
QUESTIONS
a) What is an atom?
b) What are the parts of an atom?
c) What is represented by the atomic number and the atomic mass?
d) What are the subatomic particles?
e) What are the similarities and differences between an element and atom?
f)
What is an Isotope?
g) What are the similarities and differences between an element and isotope?
h) Mention, and write the forms in which we identify the isotopes and give an example of each of one an label
the parts.
i)
How many electrons we can put in first and second energy levels?
j)
What is the electron configuration?
k) How to write the electron configuration?
l)
Write the electron configuration for: Na, Mg, Fe, Zn, Ra
m) Mention the ways to write the electron configuration.
n) What is a variable?
o) What is the relationship between science variables?
p) What is a hypothesis?
q) What is the format to write a hypothesis?
EXERCISES
A. Write down the missing information
No
Element
1
Gold
2
Aluminum
3
Tin
4
Silver
5
Nickel
Symbol
Atomic
Number
Protons
Atomic
Mass
Period
Group
number
B. Write down the missing information
ATOMIC
NUMBER
ATOMIC
MASS
PROTONS
Hyphen
Notation
NEUTRONS
Nuclear
Symbol
23
Na
11
35
Cl
17
Potassium - 41
Phosphorus - 32
56
Fe
26
Iodine - 124
C. Draw the atomic representation (Bohr’s model) for the following elements.
Sc
Ne
Xe
Br
Al
Mn
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