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10th
grade

Chemistry

66%

accuracy

2.7K

plays

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Cecilia Martinez Zavala

5 years

Chemistry

10th

grade

Isotopes

user

Cecilia Martinez Zavala

2.7K
plays

10 questions

10 questions

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1. Multiple Choice
30 seconds
1 pt
Isotopes of an element have a different number of...
Protons
Neutrons
Electrons
Mass
2. Multiple Choice
45 seconds
1 pt
Potassium-39 has how many neutrons?
19
18
20
21
3. Multiple Choice
45 seconds
1 pt
Nickel-59 has how many neutrons?
30
31
32
33
4. Multiple Choice
45 seconds
1 pt
Bromine-80 has how many neutrons?
41
42
44
45
5. Multiple Choice
45 seconds
1 pt
76 protons and 114 neutrons
Osmium-114
Osmium-76
Osmium-190
Osmium-190.23
6. Multiple Choice
45 seconds
1 pt
12 protons and 13 neutrons
Mg-12
Mg-13
Mg-25
Mg-24.305
7. Multiple Choice
30 seconds
1 pt
9 protons and 9 neutrons
Fluorine-18
Fluorine-9
Fluorine-16
Fluorine-18.998
8. Multiple Choice
2 minutes
1 pt
Rubidium has two common isotopes, ⁸⁵Rb and ⁸⁷Rb. If the abundance of ⁸⁵Rb is 72.2% and the abundance of ⁸⁷Rb is 27.8%, what is the average atomic mass of rubidium?
85.468 amu
37 amu
85.6 amu
86.4 amu
9. Multiple Choice
2 minutes
1 pt
There are two primary isotopes found in any sample of copper: copper-63 and copper-65. The isotope ⁶⁵Cu composes 69.2% of the sample and ⁶³Cu comprises the other 30.8%. Based on this data, what is the atomic mass of copper?
29 amu
63.546 amu
64.4 amu
63.6 amu
10. Multiple Choice
30 seconds
1 pt
How do you calculate mass number?
Mass x percent
Protons + Electrons
Protons + Neutrons
Neutrons + Protons + Electrons
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