52_100_Quiz1A_key_F07

52_100_Quiz1A_key_F07 - 52.100 Chemistry and the Citizen...

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52.100 Chemistry and the Citizen Quiz #1A Tuesday September 11, 2007 1. The elements carbon, C, silicon, Si, Germanium, Ge, Tin, Sn, and Lead, Pb are all in the same __________ on the periodic table. a. Period b. Club c. Group d. Section 2. Elements such as lithium, Li, strontium, Sr, aluminum, Al, tellurium, Te are known as a. Main group elements b. Transition metals c. Lanthanides d. Actinides 3. In the following atomic symbol, the number 30 represents 64 30 Zn a. Neutrons b. Protons c. Electrons d. Neutrons and protons e. Isotopes 4. The atomic number of a certain atom is 15. The number of valence electrons in this atom is a. 1 b. 2 c. 3 d. 4 e. 5 5. Adding one proton to the nucleus of an atom a. Converts it to an isotope of the same element b. Increases the mass number by one unit, but does not change the atomic number c. Increases the mass number by one unit but does change the atomic number d. Converts it to an atom of a different element
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6. The total number of known isotopes of hydrogen is a. 5 b. 4 c. 3 d. 2 e. 1 7.
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52_100_Quiz1A_key_F07 - 52.100 Chemistry and the Citizen...

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