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- 1. Multiple Choice
Subatomic particles with a negative charge
Electrons
Neutrons
Protons
Quarks
- 2. Multiple ChoiceSubatomic particles with a positive chargeneutronsatomic massprotonsisotopes
- 3. Multiple ChoiceValue representing the number of protons in an elementAtomic MassMass NumberValence ElectronsAtomic Number
- 4. Multiple ChoiceMeasure mainly of the nuclear particles: protons + neutronsSubatomic ParticlesAtomic NumberAtomic MassGluons
- 5. Multiple ChoiceA charged atomIonIsotopeElectron CloudQuark
- 6. Multiple Choice
How many protons does this isotope of titanium have?48222670 - 7. Multiple ChoiceHow many neutrons does the isotope below have? 89 36Kr533689125
- 8. Multiple Choice
If 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 X
I and II
III and IV
I and IV
I and III
- 9. Multiple Choice
How many different isotopes are shown in this mass spectrum?
1
84
86
4
- 10. Multiple Choice
How many different isotopes of this element are shown in the mass spectrum?
98
7
100
95.9 g/mol
- 11. Multiple ChoiceBased on the mass spectrum, which isotope of chlorine is most abundant?35Cl37Cl70Cl72Cl
- 12. Multiple ChoiceThe average atomic mass rhenium, Re, is 186.21 amu. If 37.1% of rhenium has mass# = 185, what is the other stable isotope?Rhenium-183Rhenium-181Rhenium-187Rhenium-189
- 13. Multiple ChoiceWhat is the empirical formula if you have 36.84% nitrogen and 63.16% oxygen?NON2O3N2O4N2O5
- 14. Multiple Choice
A 5.00 g sample of a compound consisting of calcium and chlorine contains 1.82 g of calcium and 3.23 g of chlorine. What is the empirical formula?
CaCl2
Ca2Cl4
Ca2Cl2
Ca4Cl2
- 15. Multiple Choice
How many molecules are in 2.5 mol of NaCl?
1.5 x 1024 molecules
1.5 molecules
4.15 molecules
1.5 x 1023 molecules
- 16. Multiple Choice
Calculate the number of atoms in 0.0340 g Zn.
5.20 x 10-4 atoms Zn
3.13 x 1023 atoms Zn
3.13 x 1020 atoms Zn
1.00 atom Zn
- 17. Multiple ChoiceWhich pair has the same empirical formula?NaCrO4 and Na2Cr2O7C2H4O2 and C6H12O6C3H6O3 and C2H6O2CH4 and C2H6
- 18. Multiple ChoiceWhat is the molecular formula if the empirical formula is C2H5 and the molecular molar mass is 58.14 g/mol?C2H5C4H10C1H2.5C4H8
- 19. Multiple Choice
What would be the mass of 1.5mol H2O
20.g
27 g
32 g
40.g
- 20. Multiple Choice
How many particles would be in 8.4 moles of Octane (C8H18)?
5.77 x 1023
5.06 x 1024
5.77 x 1026
5.06 x 1023
- 21. Multiple ChoiceHow many moles are in 16.94g of water?16.94 mol H2O0.9401 mol H2O305.3 mol H2O1.063 mol H2O
- 22. 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
- 23. Multiple ChoiceWhat is the average atomic mass for this element?10 amu10.8 amu19.9 amu11 amu
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