Question

3 how many energy levels does each atom, shown in the table below, have?
elements what row of the periodic table is this element on? number of energy levels
aluminum
silicon
beryllium
4 how many valence electrons does each atom, shown in the table below, have?
elements what column of the periodic table is this element in? valence electrons
aluminum
silicon
beryllium

Explanation:

Step1: Locate Aluminum in periodic table

Aluminum is in the 3rd row. So it has 3 energy - levels. It is in the 13th column (Group 13), so it has 3 valence electrons.

Step2: Locate Silicon in periodic table

Silicon is in the 3rd row. So it has 3 energy - levels. It is in the 14th column (Group 14), so it has 4 valence electrons.

Step3: Locate Beryllium in periodic table

Beryllium is in the 2nd row. So it has 2 energy - levels. It is in the 2nd column (Group 2), so it has 2 valence electrons.

Answer:

Elements	What row of the periodic table is this element on?	Number of Energy Levels	What column of the periodic table is this element in?	Valence Electrons
Silicon	3	3	14	4
Beryllium	2	2	2	2