Question

2 fill in the blank 1 point barium (ba) has type your answer... energy levels and type your answer... valence electrons.

Explanation:

Step1: Determine energy - levels

Barium has atomic number 56. Its electron - configuration shows it has 6 energy levels.

Step2: Determine valence electrons

Barium is in Group 2 of the periodic table. Elements in Group 2 have 2 valence electrons.

Answer:

6; 2