Question

examine the elements below and identify the one element that is from a different family than the others.
o
s
se
p
question 13 (0.0862 points)
how many isomers exist for the alkane whose molecular formula is $\ce{c5h12}$?
1
2
3
4 or more

Explanation:

First Sub - Question (Identifying the element from a different family)

Step1: Recall periodic table groups

O (Oxygen), S (Sulfur), and Se (Selenium) are in Group 16 (Chalcogens) of the periodic table.

Step2: Identify P's group

P (Phosphorus) is in Group 15 (Pnictogens). So P belongs to a different family than O, S, and Se.

Step1: Recall alkane isomerism

Alkanes have structural isomers based on different arrangements of carbon chains. For \(C_nH_{2n + 2}\) (alkane formula), for \(n = 5\) (\(C_5H_{12}\)), we find the isomers.

Step2: List the isomers

• \(n - \)pentane: \(CH_3CH_2CH_2CH_2CH_3\)
• 2 - methylbutane: \(CH_3CH(CH_3)CH_2CH_3\)
• 2,2 - dimethylpropane: \(C(CH_3)_4\)

So there are 3 isomers.

Answer:

P (the option with "P")

Second Sub - Question (Number of isomers of \(C_5H_{12}\))