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WorksheetsChemistry Exam Review
Total questions: 20
Worksheet time: 11mins
Tiny pieces that all matter is made of?
Ions
Molecules
Atoms
Electrons
Letters and numbers showing the types and numbers of atoms that repeat to make up a substance?
Molecules
Product
Reactant
Chemical formula
A group of atoms joined together in a particular way are called?
atoms
reactants
molecules
ions
A starting substance that is part of a chemical reaction?
property
product
reactant
atoms
What are the components of an atom?
nucleus
electrons
protons
neutrons
Convert 0.0000004 to scientific notation.
4.0 x 10 -7
.04 x 10 7
.04 x 10 -5
.4
One main difference between water and oil molecules is...?
Oil has a lower density than water so it always floats on top
Oil molecules are non-polar (hydrophobic or water fearing)
Water molecules are polar (strongly attracted to each other)
Water has a lower density than water so it always floats on top
The outer shell of an atom is usually where valence electrons can be found.
True
False
Neither True or False
I don't know
An example of an ionic bond would be.....?
CH4
NaCl
H2O
CO2
Which type of bond combines a metal atom with a non-metal atom?
Covalent
Metallic
Ionic
None of the above
The ________________________________ elements would be found on the right side of the periodic table behind the stair steps.
non-metal
metal
metalloids
None of the above
During a chemical reaction, atoms do not change from one type to another, instead atoms rearrange to form different groups of atoms.
False
True
Neither
Both
An example of a chemical reaction would be.....
Frying an egg
Ice melting into liquid water
Water freezing into ice
None of the above
The short hand for the word reaction is.....
rt
React.
Rxt
xt
How many electrons are in a triple bond?
3
4
6
1
How many electrons are in a single bond?
1
2
4
0
Other examples of chemical reactions are....
vinegar and baking soda
fireworks
spoiled food
wood burning
How many electrons are required for each element?
2
4
6
8
How many electrons does Hydrogen require to make it happy?
1
2
3
4
The first energy level of orbital holds how many electrons?
1
2
3
4
