Answered

Based on the information in the table, which elements are most likely in the same periods of the periodic table?

Facts about Five Elements

\begin{tabular}{|l|c|c|c|c|}
\hline
\multicolumn{1}{|c|}{Element} & \begin{tabular}{c}
Atomic \\
mass (amu)
\end{tabular} & \begin{tabular}{c}
Total \\
electrons
\end{tabular} & \begin{tabular}{c}
Valence \\
electrons
\end{tabular} & Year isolated \\
\hline
Aluminum (Al) & 27 & 13 & 3 & 1825 \\
\hline
Boron (B) & 11 & 5 & 3 & 1808 \\
\hline
Carbon (C) & 12 & 6 & 4 & 1803 \\
\hline
Gallium [tex]$(Ga)$[/tex] & 70 & 31 & 3 & 1875 \\
\hline
Germanium [tex]$(Ge)$[/tex] & 73 & 32 & 4 & 1886 \\
\hline
\end{tabular}

A. Boron and carbon are likely together in one period because they have very close atomic masses, while gallium and germanium are likely together in another period because they have very close atomic masses.

B. Aluminum, boron, and carbon are likely together in one period because they were first isolated in the first half of the 1800s, while gallium and germanium are likely together in another period because they were first isolated in the second half.

C. Boron and carbon are likely together in one period because they each end in "-on," while aluminum, gallium, and germanium are likely together in another period because they each end in "-ium."

D. Aluminum, boron, and gallium are likely together in one group because they have the same number of valence electrons.



Answer :

GinnyAnswer
To determine which elements are most likely in the same periods of the periodic table based on the given facts, we use the number of valence electrons. Elements in the same group of the periodic table have the same number of valence electrons. Let's analyze each of the elements:

1. Aluminum (Al)
- Atomic mass: 27
- Total electrons: 13
- Valence electrons: 3
- Year isolated: 1825

2. Boron (B)
- Atomic mass: 11
- Total electrons: 5
- Valence electrons: 3
- Year isolated: 1808

3. Carbon (C)
- Atomic mass: 12
- Total electrons: 6
- Valence electrons: 4
- Year isolated: 1803

4. Gallium (Ga)
- Atomic mass: 70
- Total electrons: 31
- Valence electrons: 3
- Year isolated: 1875

5. Germanium (Ge)
- Atomic mass: 73
- Total electrons: 32
- Valence electrons: 4
- Year isolated: 1886

Based on analysis, the elements with the same number of valence electrons can be grouped together. Let's group them:

- Group with 3 valence electrons:
- Aluminum (Al)
- Boron (B)
- Gallium (Ga)

- Group with 4 valence electrons:
- Carbon (C)
- Germanium (Ge)

These groups suggest that Aluminum, Boron, and Gallium are likely to be found in the same group of the periodic table, indicating they exhibit similar chemical properties. Likewise, Carbon and Germanium would likely be found in the same group due to having the same number of valence electrons. Hence, the correct answer based on the number of valence electrons is:

- Aluminum, Boron, and Gallium are in one group.
- Carbon and Germanium are in another group.