Question
Use the periodic table to answer the question. Which Statement about magnesium [Mg] and calcium [Ca] is correct? * 1 point
They are both classified as noble gases.
They both have the same number of valence electrons.
They both have the same number of electron shells
They are both classified as noble gases.
They both have the same number of valence electrons.
They both have the same number of electron shells
Answers
GPT-4o mini
The correct statement about magnesium [Mg] and calcium [Ca] is:
**They both have the same number of valence electrons.**
Both magnesium and calcium are in Group 2 of the periodic table, which means they each have 2 valence electrons.
The other statements are incorrect because:
- Neither magnesium nor calcium is classified as a noble gas; noble gases are found in Group 18.
- Magnesium (atomic number 12) has 3 electron shells, while calcium (atomic number 20) has 4 electron shells.
**They both have the same number of valence electrons.**
Both magnesium and calcium are in Group 2 of the periodic table, which means they each have 2 valence electrons.
The other statements are incorrect because:
- Neither magnesium nor calcium is classified as a noble gas; noble gases are found in Group 18.
- Magnesium (atomic number 12) has 3 electron shells, while calcium (atomic number 20) has 4 electron shells.