How many valence electrons does an atom of rubidium have?
A) one
B) five
C) six
D) thirty-seven
My answer is A) one
correct
To determine the number of valence electrons in an atom of rubidium, you need to look at rubidium's position in the periodic table. Rubidium (Rb) is in Group 1 of the periodic table, which is also known as the alkali metals group.
The alkali metals group consists of elements with one valence electron. This means that all the atoms in this group have one electron in their outermost energy level.
Therefore, an atom of rubidium has one valence electron.
The correct answer is A) one.