Question

you would expect magnesium to be most similar in properties to
a) sulfur.
b) calcium.
c) silicon.
d) potassium.
question 8 (5 points)
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the modern view of an electron orbital in an atom can best be described as
a) a spherical shell on the surface of which an electron can be found.
b) a three - dimensional space that shows the probability where an electron is most likely to be found.
c) an elliptical path an electron follows around the nucleus.

Explanation:

For the first question:

• Magnesium (\(Mg\)) is in Group 2 (alkaline earth metals) of the periodic table.
• Calcium (\(Ca\)) is also in Group 2. Elements in the same group have similar chemical properties because they have the same number of valence electrons.
• Sulfur (\(S\)) is in Group 16, silicon (\(Si\)) in Group 14, and potassium (\(K\)) in Group 1.

For the second question:

• According to quantum mechanics, an electron orbital is a three - dimensional space that represents the probability of finding an electron.
• Option A is incorrect because it's not just a spherical shell surface.
• Option C is the old - fashioned (Bohr - like, incorrect in the modern view) idea of an electron path.

Answer:

For the first question: B. calcium
For the second question: B. a three - dimensional space that shows the probability where an electron is most likely to be found.