Which two elements would have the same number of valence electrons?
When looking at the periodic table, you can determine how many valence electrons a group has. A group is a vertical column on the periodic table. The number of valence electrons in a group is listed at the top of Groups 1 and 2, and Groups 13-18. When trying to determine the number of valence electrons in an atom, look for the number in front of the letter A. The number in front of the letter A tells you the number of valence electrons in an atom.
When looking at the periodic table, you might notice the letter B with a number in front of it. The number in front of the letter B does not tell you the number of valence electrons in an atom.
Valence electrons determine how reactive an atom is
Valence electrons are the electrons is the outermost occupied energy level.
You cannot have zero valence electrons
You can have between 1 and 8 valence electrons
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Which two elements would have the same number of valence electrons?
Na and Mg
B and Sc
B and Al
Al and Si