Question

storyline 1 exam
how many valence electrons are lost by the metallic element when forming the ionic compound bas?
3
1
4
2

Explanation:

Ba is a metallic element (barium). Barium is in Group 2 of the periodic table. Elements in Group 2 have 2 valence electrons. When forming ionic compounds, metallic elements lose electrons. For the ionic compound BaS, barium (Ba) will lose its 2 valence electrons to form \(Ba^{2 +}\) and sulfur (S) will gain 2 electrons to form \(S^{2-}\).

Answer:

2