Barium Phosphite and Ionic Compounds

The video explains the Lewis structure for barium phosphite (Ba3P2), an ionic compound. It details the electron transfer from barium, a metal, to phosphorus, a non-metal, resulting in the formation of an ionic bond. The video describes how each barium atom loses electrons to achieve a positive charge, while phosphorus gains electrons to form a stable octet. The concept of ionic charges and the necessity of three barium atoms for two phosphorus atoms are discussed. The video concludes with an explanation of the formula unit for solid barium phosphide.

What type of compound is barium phosphite?

• Covalent

• Molecular

• Ionic

• Metallic

How many barium atoms are present in barium phosphite?

• One

• Two

• Four

• Three

In which group is barium found on the periodic table?

• Group 2

• Group 1

• Group 15

• Group 18

How many valence electrons does phosphorus have?

• Seven

• Five

• Three

• Eight

What is the charge on a phosphorus ion in barium phosphite?

• 1-

• 2-

• 3-

• 4-

What happens to barium atoms when they lose electrons?

• They remain neutral

• They become negatively charged

• They gain more electrons

• They become positively charged

What is the charge on a barium ion in barium phosphite?

• 3+

• 2+

• 4+

• 1+

What is the purpose of brackets around phosphorus in the Lewis structure?

• To indicate it is a metal

• To show it is a non-metal

• To denote transferred electrons

• To highlight its atomic number

What is a formula unit in the context of ionic compounds?

• A single molecule

• A repeating pattern of ions

• A covalent bond

• A metallic bond

Why are three barium atoms needed for every two phosphorus atoms in barium phosphite?

• To balance the mass

• To achieve electrical neutrality

• To form covalent bonds

• To increase stability