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WorksheetsPhysical and Chemical Changes (Chemistry)
Total questions: 20
Worksheet time: 4mins
How many atoms of oxygen (O) are in this formula:
2MgClO2
2
4
6
The Law of Conservation of Mass states:
Mass can not be.....
Created
Destroyed
Created nor Destroyed
Which number below represents a subscript in this formula? 4HOBr3I
1
3
4
When bonding, if a an element gives up electron is becomes more _________.
Negative
Positive
Which choice below in not evidence that a chemical change has taken place
Change in state
Smoke
Bubbles
Precipitate
What is the coefficient is the following formula?
H2SO4
1
2
4
Is the following formula balanced?
H2 + O2 ----> H2O
Yes
No
When balancing equations you are allowed to add coefficients to try and balance it.
True
False
After an electron is given up by one element, that element is known as a __________.
Cation
Anion
Which type of bonding involves the sharing of electrons?
Covalent
Ionic
Subscripts can not be changed in anyway when trying to balance an equation.
True
False
Which choice best matches the type of reaction shown below?
AB ----> A + B
Decomposition
Synthesis
Combustion
Valence electrons are.....
Found in the first energy level
Available for bonding
Positive in charge
Covalent bonding occurs between...
Metals and nonmetals
Nonmetals
Which is an example of a physical change?
Fireworks
Digesting Food
Nail Rusting
Dissolving salt in water
All compounds are molecules.
True
False
The properties of a compound are different than the properties of the elements that make it up?
True
False
Physical and chemical changes both involve the transfer of energy.
True
False
This image best represent a .......
Element
Mixture
Compound
What day are we now suppose to go back to hybrid learning?
February 1st
March 1st
