Multiple Choice
How many valence electrons does silicon (Si) have?
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10. Periodic Properties of the Elements
Valence Electrons of Elements
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Chlorine has 7 valence electrons. With which group of elements will chlorine most readily bond to achieve a stable electron configuration?
A
Group 1 (alkali metals)
B
Group 18 (noble gases)
C
Group 17 (halogens)
D
Group 2 (alkaline earth metals)
Verified step by step guidance1
Identify the number of valence electrons in chlorine, which is 7, meaning it needs 1 more electron to complete its octet and achieve a stable electron configuration.
Recall that elements tend to bond in a way that allows them to achieve a full valence shell, often resembling the electron configuration of the nearest noble gas.
Consider the groups of elements provided: Group 1 (alkali metals) have 1 valence electron, Group 18 (noble gases) already have full valence shells, Group 17 (halogens) have 7 valence electrons like chlorine, and Group 2 (alkaline earth metals) have 2 valence electrons.
Determine which group can provide the 1 electron chlorine needs to complete its octet. Group 1 elements tend to lose 1 electron easily, making them likely to bond with chlorine by transferring that electron.
Conclude that chlorine will most readily bond with Group 1 (alkali metals) because they can donate 1 electron, allowing chlorine to achieve a stable electron configuration.
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