Question

e. beryllium and nitrogen be n
extension: chemical families
get the gizmo ready:
● select lithium (li) from the select a metal list.
● you will need a periodic table for this activity.
introduction: the periodic table arranges elements by size and property. the vertical columns represent chemical families, or groups of elements with similar chemical properties.
question: how are elements arranged into chemical families?

1. observe: drag the nonmetal into the trash ( ) so there is only the one lithium atom visible.

a. how many valence electrons does lithium have?

Explanation:

Step1: Recall valence - electron concept

Valence electrons are the electrons in the outermost shell of an atom.

Step2: Determine lithium's electron - configuration

Lithium (Li) has an atomic number of 3. Its electron - configuration is 1s²2s¹. The outermost shell is the second shell (n = 2) and it has 1 electron in this shell.

Answer:

1