Which one of the compounds below is most likely to be ionic?GaAsScCl3NO2CCl4ClO2

The compound most likely to be ionic is ScCl3.

Here's why:

Ionic compounds are formed when a metal reacts with a non-metal. They involve the transfer of electrons from the metal atom to the non-metal atom, resulting in a positive metal ion and a negative non-metal ion. These ions are held together by the strong electrostatic forces of attraction between oppositely charged ions, which is known as ionic bonding.

Looking at the given compounds:

1. GaAs: This is a covalent compound, not ionic. Both Gallium (Ga) and Arsenic (As) are metals.

2. ScCl3: This is an ionic compound. Scandium (Sc) is a metal and Chlorine (Cl) is a non-metal.

3. NO2: This is a covalent compound. Both Nitrogen (N) and Oxygen (O) are non-metals.

4. CCl4: This is a covalent compound. Both Carbon (C) and Chlorine (Cl) are non-metals.

5. ClO2: This is a covalent compound. Both Chlorine (Cl) and Oxygen (O) are non-metals.

Therefore, ScCl3 is the most likely to be an ionic compound.