Atoms and the Periodic Table Mid-Topic Test
Name:…………….
1. Protons and neutrons are found in the ………………………………
Electrons are found in………………………………………………….
(2)
2. Draw a picture of a chlorine atom: Atomics Number: 17 Mass Number: 35
Number of protons =
Number of neutrons =
Number of electrons =
(6)
3. With reference to protons and electrons, explain why atoms are neutral.
(2)
4. Fill out the Periodic Table (include the atomic number, symbol and electron configuration in each
box):
Grp:1
1
H
2
3
3
Li
4
Be
5
B
11
12
Mg
13
4
5
6
C
7
N
8
O
2, 4
2,8, 1
19
K
2, 8, 4
F
2, 6
15
Si
2, 8, 3
7
17
S
2, 8, 5
8
2
He
10
Ne
2,8
18
Ar
2, 8, 6
20
2, 8, 8, 2
(20)
Look at Li, Na, K. What similarities do you notice about the outer electrons?
(1)
Look at Oxygen and Sulfur. What similarities do you notice about the number of electrons in
their last shell?
(1)
Which 2 elements have 7 electrons in their outer shell?...........................................
(1)
Look at the periodic table, can you guess which other 2 elements also have 7 electrons in their
outer shell?
(2)
4.
Fill in the table:
Element
Symbol
Remember:
Atomic
Number
Potassium
Mass = proton + neutrons
Number of neutrons = mass - protons
Number of
Protons
19
Number of
Neutrons
20
Fluorine
Mass
Electron
Configuration
19
Magnesium
12
Sulfur
32
(8)
5. Copper has the atomic number of 29 and a mass of 63.
Number of Protons:
Number of Neutrons:
Number of Electrons:
(3)
6. State the elements in these common compounds:
NaCl……………………………….........................................................................
KOH……………………………….........................................................................
CuSO4…………………………….........................................................................
CO2…….………………………….........................................................................
(8)
7. Look at the periodic table: What is the atomic number and mass of:
Gold (Au):
Atomic Number
Mercury (Hg): Atomic Number
Mass:
Mass:
(4)
8. Draw and describe in words the Atomic structure of sodium.