Naming Covalent Compounds — Unit test Answers

Formaldehyde is an organic compound. Each molecule includes two hydrogen (H) atoms, one oxygen (O) atom, and one carbon (C) atom. Below are the dot structures for each of these elements.Which diagram shows how the covalent bonds most likely form in a formaldehyde molecule?

Lionel has a hot plate, a thermometer, a container of water, a spoon, and a small hammer. Using these tools, Lionel can test several properties of an ionic compound.Which property of the compound will he not be able to test?

During a test, what can a student use to identify what type and how many atoms are in a chemical compound?

What causes an ionic bond to form between sodium and chlorine?

What happens to the total mass of a substance undergoing a physical change?

Which term best describes all atoms in ionic bonds?

Which is the only element in group 1 on the periodic table that forms covalent bonds?

Which state(s) of matter have no definite shape or volume?

The element sulfur (S) is most likely to form covalent bonds with the element

A gas has an initial volume of 2.5 L at a temperature of 275 K and a pressure of 2.1 atm. The pressure of the gas increases to 2.7 atm, and the temperature of the gas increases to 298 K.

What is conserved in physical changes?

The atoms in a sample are close together but can slide past one another. As the atoms lose energy, they move slower. The atoms become locked in place because of attractive forces between them.

Which statement gives two characteristics of all liquids?

Giovanni created this chart to study for an exam.Which best describes how to correct the error in the chart?

An amount of nitrogen undergoes a physical change and increases its volume. What can be known about this physical change?