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Basic Chemistry Practice Test: Atoms, Molecules, and Ions
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Basic Chemistry Practice Test: Atoms, Molecules, and Ions
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25 Questions

1. Which species has 16 protons?
2. The correct formula of iron(III) bromide is __________.
3. What is the molecular formula for heptane __________?
4. Which metal forms cations of differing charges?
5. The name of PCl3 is __________.
6. The name of the binary compound N2O4 is __________.
7. Element M reacts with fluorine to form an ionic compound with the formula MF3 . The M-ion has 18 electrons. Element M is __________.
8. An ion has 8 protons, 9 neutrons, and 10 electrons. The symbol for the ion is __________.
9. The charge on the __________ ion is -3.
10. Which one of the following molecular formulas is also an empirical formula?
11. Which pair of elements below should be the most similar in chemical properties?
12. Of the following, __________ contains the greatest number of electrons.
13. Of the following, only __________ is not a metalloid.
14. How many electrons does the Al3+ ion possess?
15. The ions Ca2+ and 3- PO4 form a salt with the formula __________.
16. The formula of the chromate ion is __________.
17. The formula for the compound formed between aluminum ions and phosphate ions is __________.
18. Of the following, the smallest and lightest subatomic particle is the __________.
19. Of the three types of radioactivity characterized by Rutherford, which is/are electrically charged?
20. Which one of the following is not true concerning cathode rays?
21. What is the correct formula for ammonium sulfide?
22. Vanadium has two naturally occurring isotopes, 50V with an atomic mass of 49.9472 amu and 51V with an atomic mass of 50.9440. The atomic weight of vanadium is 50.9415. The percent abundances of the vanadium isotopes are __________% 50V and __________% 51V .
23. Of the three types of radioactivity characterized by Rutherford, which is/are not particles?
24. The correct name for HlO2 is __________.
25. Which one of the following is most likely to lose electrons when forming an ion?

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