Aluminum (Al) has three valence electrons and a total of three subshells. Without using the periodic table, in which group and period is aluminum located?
A) Group 3B, Period 6
B) Group 1A, Period 1
C) Group 6A, Period 3
D) Group 3A, Period 3
I chose D

Atomic number of aluminium is 13 and its electronic configuration is [tex]1s^{2}2s^{2}2p^{6}3s^{2}3p^{1}[/tex]. As here n = 3 this means that aluminium element belongs to period.

Since, it contains 3 unpaired electrons. Therefore, in order to attain stability it will readily lose its valence electrons and hence, acquires as charge of +3.

This means that aluminium element belongs to group 3A and period 3. As it is a p-block element.

Thus, we can conclude that aluminium is located in Group 3A, Period 3.

Aluminum (Al) has three valence electrons and a total of three subshells. Without using the periodic table, in which group and period is aluminum located? A) Group 3B, Period 6 B) Group 1A, Period 1 C) Group 6A, Period 3 D) Group 3A, Period 3 *I chose D *

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Aluminum (Al) has three valence electrons and a total of three subshells. Without using the periodic table, in which group and period is aluminum located?
A) Group 3B, Period 6
B) Group 1A, Period 1
C) Group 6A, Period 3
D) Group 3A, Period 3
I chose D