Question

question 11
4 points
lithium has an atomic number of 3. how many electrons are there in the outermost (valence) shell?
zero
one
three
two
clear selection

Explanation:

The atomic number of an element equals the number of protons and also the number of electrons in a neutral atom. For lithium (atomic number 3), the electron configuration follows the rules of electron shell filling. The first shell (K - shell) can hold a maximum of 2 electrons, and the second shell (L - shell) starts filling next. So, lithium has 2 electrons in the first shell and 1 electron in the outermost (valence) shell.

Answer:

B. one