1. Who discovered Noble Gases in 1894?
2. The energy needed to take away an electron from a molecule or ion is known as what?
3. Which oxides, when mixed with water, form an acidic solution? Metal or nonmetal?
4. Which family on the periodic table is "very dangerous"?
5. As elements gain protons in the nucleus, what happens to the size of their radius?
6. One is able to determine what by looking at the nuclear charge of a specific atom?
7. True or False? The greatest ionization energy is found in group 5A?
8. Some of the earliest periodic tables, constructed in the 1860s, were arranged by an element's what?
9. How many known elements were on Mendeleev's first periodic table?
10. What is it called when a molecule or ion has the ability to gain an electron and become a negative ion?
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