Unsaturated hydrocarbons are those in which each carbon atom is attached to as many hydrogen atoms as it possibly can. There can be no double bonds or non-hydrogen functional groups, since these detract from the maximum possible number of hydrogens that each carbon can be attached to (in the case of double bonds, two carbons are bonded to each other when they could alternately be bonded to one more hydrogen each).
All of the alkanes (including the cycloalkanes) are saturated hydrocarbons. Substituted alkanes, alkenes, alkynes, and their cyclic counterparts are all unsaturated.
Answer:
The answer to your question is below.
Explanation:
1. Has 4 energy levels
<u>a. K </u><u>Potassium is in period 4 so it has four energy levels</u>
<u>b. Ga </u><u>Also Galium is located in period four, so it has four energy levels.</u>
c. Al Aluminum only has 3 energy levels.
<u>d. Ge </u><u>Germanium has four energy levels</u>
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2. Tends to lose 3 electrons
a. K Potassium only lose one electron
<u>b. Ga </u><u>Gallium loses 3 electrons because is in group three.</u><u>
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<u>c. Al </u><u>Aluminum loses 3 electrons</u>
d. Ge Germanium tends to gain or lose four electrons.
<span>Ionic change’ is the closest answer - electric currents are conducted by ions in some substances, though not metal. The filament - metal wire - in an incandescent lightbulb glows with visible light because it is heated to a very high temperature by an electric current being passed through it. It is not a physical change because this generally involves change from one state to another — for example, solid to liquid. Chemical changes usually result from chemical reactions. </span>