_11. How many known elements are there in in the periodic table?
a. 88
b. 98
C. 108
d. 118
12. How should the following italicized statement be taken? Elements can be broken further into
simpler substances.
a. True
b. False
13. What are the components of a compounds?
a. atoms
b. mixtures
C. substances
d. two or more substances
14. How should the following italicized statement be taken? Compounds can be broken down into
simpler substances.
a. True
b. False
15. Are there more compounds than'elements?
a. Yes
b. No
16. In which method did Dmitri Mendeleev organize elements?
a. by number of electrons
b. by increasing atomic weight and similar properties
c. by increasing atomic number and similar properties d. by alphabetical order
17. Which one served as basis for the arrangement of the elements
a. Atomic masses
b. mass number
c. atomic number
d. atomic weight
18. What do you call the vertical column in the periodic table?
a. branch
b. family
c. period
d. valence
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