WorksheetsUnit 1 Atoms
Total questions: 20
Worksheet time: 28mins
Name
Class
Date
1.
What can I use on the Periodic table to find the number of Valence Electrons?
a)
atomic mass
b)
atomic number
c)
group number
d)
element box
2.
Which chemical symbol is an example of a compound?
a)
H2O
b)
He
c)
Mg
d)
Fe
3.
What is a combination of 2 or more different atoms?
a)
atom
b)
proton
c)
compound
4.
How do you know that 8 is the largest number of valence electrons an atom can have?
a)
The Period number is 8
b)
This question is wrong, the largest number of valence electrons is 3
c)
The largest group number is 18
5.
Valence electrons are found on the ___________ shell, and help atoms to _____________ to form molecules.
a)
inner, bond
b)
outer, break apart
c)
outer, bond
6.
The inner shell can only hold ___ electrons.
a)
1
b)
3
c)
as many as needed
d)
2
7.
The reactivity of metals increases as you move toward the _________ side of the Periodic table.
a)
right
b)
left
c)
upper
8.
How can we determine the number of electrons in an atom?
a)
subtract the atomic number from the atomic mass
b)
It is the same as the number of neutrons
c)
It is the same as the number of protons
9.
malleable means
a)
It can be pulled into strands of wire
b)
it can be bent
c)
it can be burnt and not change the element
10.
In which group do we find the most reactive metals?
a)
1
b)
3
c)
4
11.
Group 18 usually has 8 valence atoms, this is a full outer shell. What does this tell you?
a)
They are gasses
b)
They usually won't react with other elements.
c)
These elements are malleable
d)
These are alkali metals.
12.
Most metals are ________________________
a)
too hard to be malleable
b)
found in group 0 of the Periodic Table
c)
good conductors of heat and electricity
13.
Use your periodic table,
How many protons does Li (Lithium) have?
How many protons does Li (Lithium) have?
a)
3
b)
2
c)
7
14.
Use your Periodic Table,
How many neutrons are found in Na?
How many neutrons are found in Na?
a)
12
b)
13
c)
22
15.
In a Bohr's model, how many electrons should be in the outer shell of Na? Use your periodic table to help.
a)
1
b)
5
c)
2
16.
How many protons, neutrons, and electrons are in He? Use your periodic table.
a)
p=2, n= 2 , e = 2
b)
p= 4 n= 2 e=2
17.
Which group of elements have 7 valence electrons? Use your table
a)
7
b)
17
c)
71
18.
How can you identify a compound?
a)
a compound is made up of the same atom
b)
it is 2 made up of or more different atoms
19.
What is the charge of an atom that has 2 protons and 3 electrons?
a)
neutral
b)
positive
c)
negative
20.
The element Kr (Krypton) has an atomic number of 36 and an atomic weight of 83.80. How many neutrons does it have?
a)
58
b)
48
c)
36
100 %
