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- 1. Multiple Choice
The element with the symbol H is:
hydrogen
helium
water
hafnium
- 2. Multiple Choice
The element with the symbol Cu is:
copper.
lead.
chromium.
cobalt.
- 3. Multiple Choice
The element with the symbol Pb is:
potassium.
lead.
iron.
phosphorous.
- 4. Multiple Choice
The element with the symbol Cl is:
carbon.
chlorine.
chromium.
cobalt.
- 5. Multiple Choice
The element with the atomic number 14 is:
silicon.
nitrogen.
carbon.
neon.
- 6. Multiple Choice
The element with atomic number 27 is:
cobalt.
copper.
aluminium.
manganese.
- 7. Multiple Choice
How many protons does vanadium have?
23
51
28
20
- 8. Multiple Choice
How many protons does tin have?
22
52
50
119
- 9. Multiple Choice
Atoms of which of the following elements has the most protons?
iron
sulfur
aluminium
boron
- 10. Multiple Choice
Atoms of which of the following elements have the most protons?
carbon
fluorine
sodium
chlorine
- 11. Multiple Choice
Select the TRUE statement.
Atoms of the same element have the same number of protons.
The mass number of an element is the total number of protons and electrons.
Atoms of the same element have the same number of neutrons.
The mass number of an element is equal to the number of electrons.
- 12. Multiple Choice
An atom has four protons and five neutrons. Its atomic number is:
4
5
9
20
- 13. Multiple Choice
An atom has four protons and five neutrons. Its mass number is:
4
5
9
20
- 14. Multiple Choice
An atom has seventeen electrons and 18 neutrons. Its mass number is:
35
35.45
17
18
- 15. Multiple Choice
An atom has 35 protons, 44 neutrons and 35 electrons. It is an atom of:
bromine.
ruthenium.
gold.
chlorine.
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