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Chemistry
8th -
10thgrade
Atoms, Ions, and Isotopes (Structure Extra Practice)
28 questions
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- 1. Multiple ChoiceAdding or subtracting neutrons (charge = 0, mass = 1) makes the element change into an...ionmixtureisotopeneutral atom
- 2. Multiple ChoiceThe atomic number is equal to _.the number of protons and electronsthe number of neutrons onlythe total number of protons and neutronsthe number of protons neutrons and electrons
- 3. Multiple Choice
What is the charge on a lithium atom that loses 1 electron?
+1
0
-1
-2
- 4. Multiple Choice
Is the element shown in this image an ion, isotope or neutral atom?
atom
isotope
cation (+ ion)
anion (- ion)
- 5. Multiple Choice
Helium (He, atomic number 2) can have 2 protons, 2 neutrons, and 2 electrons. Is the pictured He atom the neutral atom described, an ion, or an isotope of the atom?
neutral atom
cation (+ ion)
isotope
anion (-)
- 6. Multiple ChoiceThe atomic mass is equal to _.the number of protons onlythe number of neutrons onlythe total number of protons and neutronsthe number of protons, neutrons, and electrons.
- 7. Multiple ChoiceWhat is the net charge on the element shown above?
(Calcium - atomic number 20)cation +1 chargecation +2 chargeanion -1 chargeanion -2 charge - 8. Multiple ChoiceHow many protons does this isotope of titanium have? Hint titanium has an atomic number of 22.48222670
- 9. Multiple ChoiceWhat element is this? What is the mass number of this atom?sodium, 23magnesium, 23magnesium, 12sodium, 11
- 10. Multiple ChoiceWhich atom has 4 neutrons?Li-6Li-7Li-8they have the same # of neutrons
- 11. Multiple ChoiceWhat is the atomic number of Fe? (click to see image)2655.84556None of these
- 12. Multiple Choice
How many neutrons does B-11 contain?
5
11
6
10.811
- 13. Multiple Choice
Carbon has an atomic number of 6 and usually has a mass number of 12. Which of the following would be considered isotopes of carbon?
Carbon-12
Carbon-13
Carbon-14
Both Carbon-13 and Carbon-14
- 14. Multiple Choice
The image shows that Hydrogen can become an isotope by adding a(n)..
electron
proton
neutron
any of the above answers
- 15. Multiple Choice
How many neutrons does Lithium-7 have
3
4
6.94
24.94
- 16. Multiple Choice24.1% of all the isotopes of a an element have a mass of 75.23 amu, 48.7% have a mass of 74.61 amu, and 27.2% have a mass of 75.20 amu.
What is the average mass of this element?74.92 amu24.97 amu75.01 amu74.51 amu - 17. Multiple ChoiceCalcium has three different isotopes. One has a mass of 35.00 amu; another has a mass of 41.00 amu; and another has a mass of 40.00 amu. Which isotope is the most abundant of the three?40.00 amu41.00 amu35.00 amuimpossible to tell
- 18. Multiple ChoiceAn element has three different isotopes. One has a mass of 35.00 amu; another has a mass of 36.00 amu; and another has a mass of 38.00 amu. What is the average atomic mass of this element?36.33 amu37.00 amu12.11 amuimpossible to tell
- 19. Multiple ChoiceAtom 1 has Mass=12 Protons=6
Atom 2 has Mass= 14 Electrons=6
Are these atoms isotopes of each other or different elements?Different Elements - Mg & SiDifferent Elements - Ar & CaIsotopes of CarbonIsotopes of Magnesium - 20. Multiple ChoiceIsotopes are atoms of the same element that have the same number of __________ but different number of __________ . Therefore, isotopes of the same element have different masses.protons, neutronsprotons, electronsneutrons, protonselectrons, protons
- 21. Multiple ChoiceThe mass of an atom is located in the ___________ and the volume of an atom is made of the ____________electron cloud, nucleuselectron cloud, energy levelsnucleus, electron cloudnucleus, neutrons
- 22. Multiple ChoiceDo the following atoms belong to the same element? Explain
Aluminum-27
An atom with 14 protons and 13 neutronsYes because they have the same number of protonsYes because they have the same massNo because they have different number of protonsNo because they have different number of neutrons - 23. 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
- 24. Multiple ChoiceWhat is the mass number of this atom?1347
- 25. Multiple ChoiceIdentify this atom.LithiumBoronCarbonNeon
- 26. Multiple ChoiceHow many protons does He have?4260
- 27. Multiple ChoiceThe top number in this isotope notation isthe mass numberthe atomic numberthe atomic massthe neutron number
- 28. Multiple ChoiceThe bottom number in this isotope notation isthe mass numberthe atomic numberthe atomic massthe neutron number
- Answer choicesTagsAnswer choicesTags