Cell theory is one of the most basic principles of biology in which living organisms are made up of cells
The answer of your question is True
(1) compound with seven carbons with double bond and the rest single bond :
HEPTENE
(2) four carbons with a double bond between the third and the fourth carbon:
1-BUTENE
(3) Propyl group branching from the third carbon from the left:
3-Propyl heptene
Explanation:
These elements are rare because:
<u>Helium fuses into the carbon by the combination of three helium nuclei (Z = 2) and one carbon nucleus (Z = 6), therefore bypassing elements with Z= 3, 4 and 5 which are lithium, beryllium, and boron respectively. Therefore, the fusion processes in cores of the stars do not form these three elements. </u>