page 6 CHEM 1492 Practice Final 21. Write the symbol of ONE element from the Per

Question

page 6 CHEM 1492 Practice Final 21. Write the symbol of ONE element from the Periodic Table below fitting the ns below: (More than one element may apply for each description.) (2 pts each) alkali metal _alkaline earth metal a diatomic element metal with two valence electrons noble gas halogen metal in the fifth period -nonmetal in the third period nonmetal with four valence electrons an element with atomic number 1 Li Al Ti Ni Sn Ba 22. Name cach of the following hydrocarbons. (3 points each) a. CH CH CHCH CH CHy b. CHCH CH CHCH-CH CHi c. CH CHCH CH Revised 11/15

Explanation / Answer

Ans 21:

Li is an alkali metal

Mg is an alkaline earth metal

Kr is a noble gas

Br is a halogen

Mo is a 5th period element

H is a diatomic element

Mg has two valence electrons

S is a non metal

C has four valence electrons

H has atomic number 1

Ans 22:

a) n-Pentane

b) 3-methyl hexane

c) 2-methyl butane

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