In the following picture of an oxide,darkly-shaded spheres represent oxygen atoms or ions and lightly-shaded spheres represent atoms or ions of a second-row element in its highest oxidation state.Tell whether the oxide is covalent or ionic and whether the oxide is expected to be a gas (or a liquid)or a high-melting solid.
A)covalent and gas or liquid
B)covalent and high-melting solid
C)ionic and liquid or gas
D)ionic and high-melting solid

Question

In the following picture of an oxide,darkly-shaded spheres represent oxygen atoms or ions and lightly-shaded spheres represent atoms or ions of a second-row element in its highest oxidation state.Tell whether the oxide is covalent or ionic and whether the oxide is expected to be a gas (or a liquid)or a high-melting solid. 
A)covalent and gas or liquid 
B)covalent and high-melting solid 
C)ionic and liquid or gas 
D)ionic and high-melting solid

Quizplus · Accepted Answer

The oxide is covalent because it consists of nonmetals (oxygen and a second-row element). Additionally, the fact that it is made up of small, discrete molecules suggests that it is a gas or liquid rather than a solid. Therefore, choice A is the best option.

In the Following Picture of an Oxide,darkly-Shaded Spheres Represent Oxygen