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- 1. Multiple Choice
What is the mass number of this atom?
1
3
4
7
- 2. Multiple Choice
What is the atomic number of Barium, Ba? (enlarge the periodic table)
20
38
56
88
- 3. Multiple Choice
How many protons are in a sodium atom, Na? (tap to enlarge the periodic table)
Sodium has 1 proton.
Sodium has 3 protons.
Sodium has 11 protons
- 4. Multiple Choice
Atoms of the same element which have a different number of neutrons are called _________________.
ions
isotopes
quarks
molecules
- 5. Multiple Choice
Which subatomic particle has a negative charge in the atom?
proton
neutron
electron
quark
- 6. Multiple Choice
How many neutrons does C-14 contain? (tap to enlarge the image)
6
7
14
8
- 7. Multiple Choice
ALL atoms of the same element have:
same number of proton
same number of nucleon
different number of neutron
different number of electron
- 8. Multiple ChoiceIf X is the symbol for an element, which of the following two symbols represent isotopes of the same element? I. 7735X II. 7733X III. 8137X IV. 8135 XI and IIIII and IVI and IVI and III
- 9. Multiple ChoiceHow many neutrons does the isotope below have? 89 36Kr533689125
- 10. Multiple ChoiceFour isotopes of lead include lead-204, lead-206, lead-207, and lead-208. The average atomic mass of lead is 207.2. Which isotope of lead is likely to be the most abundant.204206207208
- 11. Multiple ChoiceWhich subatomic particles contribute the most to the mass of an atom?Protons, Neutrons, ElectronsProtons onlyProtons and ElectronsProtons and Neutrons
- 12. Multiple ChoiceThe number of protons is equal tothe atomic numberthe number of neutronsthe energy levelsthe periodic table groups
- 13. Fill in the Blank
If an atom has 12 neutrons and 11 protons, what is its atomic mass?
- 14. Multiple ChoiceHow many protons does this isotope of titanium have?48222670
- 15. Multiple ChoiceCalculate the average atomic mass of silver.106.38649amu111.91896amu107.8677amu121
- 16. Multiple ChoiceAn element has two naturally occurring isotopes. One is 10.013 amu and is 19.9% abundant. The other is 11.01 amu and is 80.1% abundant. What is the average atomic mass? What element is it?9.012, Beryllium12.011, Carbon6.941, Lithium10.812, Boron
- 17. Multiple ChoiceOxygen has 8 protons. What is oxygen's atomic number?16815.9990
- 18. Multiple Choice
What is the charge on a lithium atom that loses 1 electron?
+1
0
-1
-2
- 19. Multiple Choice
What is the atomic number of Fe? (click to see image)
26
55.845
56
30
- 20. Multiple Choice28313
- 21. Multiple Choice127814
- 22. Multiple Choice
Valence electrons are in the...
Innermost energy level of the atom.
Middle energy level of the atom.
Outermost energy level of the atom.
energy levels of the atom.
- 23. Multiple Choice
How many valence electrons does Helium have?
1
2
3
4
5
- Answer choicesTagsAnswer choicesTags