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- 1. Multiple Choice
What is an element?
A pure substance that cannot be broken down into two or more simpler substances by chemical processes.
An impure substance that cannot be broken down into two or more simpler substances by chemical processes.
A pure substance that can be broken down into two or more simpler substances by chemical processes.
An impure substance that can be broken down into two or more simpler substances by chemical processes.
- 2. Multiple Choice
Which is NOT an element?
Carbon
Copper
Oxygen
Carbon dioxide
- 3. Multiple Choice
Which is the correct symbol for Hydrogen?
Hg
H
He
- 4. Multiple Choice
Which list contains three elements?
Air, Nitrogen, Oxygen
Brass, Solder, Steel
Carbon, Iron, Zinc
Hydrogen, Oxygen, Water
- 5. Multiple Choice
Diatomic molecules are those formed by the combination of two atoms. Which of the following is a diatomic molecules?
P4
O3
S8
N2
- 6. Multiple Choice
Which is a compound?
X
Y
Z
W
- 7. Multiple Choice
Ammonium carbonate is a salt with the chemical formula (NH4)2CO3. What is the number of elements in ammonium carbonate?
2
3
4
5
- 8. Multiple Choice
Which of these elements is a monatomic?
Ar
N2
H2
P4
- 9. Multiple Choice
How many N atoms are there in Pb(NO3)2?
2
3
4
5
- 10. Multiple ChoiceWhich of the following represents an element?H2OH2NaClCaCO3
- 11. Multiple ChoiceSalt has a chemical formula of NaCl. Salt is a...CompoundElementMixtureNone of the Above
- 12. Multiple ChoiceWhat cannot be broken down into other substances?CompoundMixtureSolidsElement
- 13. Multiple ChoiceWhat is made up two or more elements that are chemically combined?ElementMixtureCompoundSolids
- 14. Multiple ChoiceHow many elements are represented in the compound?
Na2CO31234 - Answer choicesTagsAnswer choicesTags