chapter 11 lesson 2 quiz

a sulfur dioxide molecule has one sulfur atom and two oxygen atoms. which is its correct chemical formula?

A

define chemical bond in your own words

A chemical bond that is made when two atoms share valence electrons.

explain why water is a polar molecule.

Because it is made of oxygen and hydrogen and one is partially negative and one is partially positive. Oxygen pulls on the valence electrons more and has a partial negative charge. Hydrogen is partially positive.

the group of symbols and numbers that shows the types and numbers of atoms that make up a compound is...

Chemical formula

in chlorine gas, two chlorine atoms join to form CI2 molecule. how many pairs of valence electrons do the atoms have?

Three double covalent bonds and one single covalent bond.

use the term molecule in a complete sentence.

The chemically stable unit of a covalent compound is a molecule.

develop an analogy to explain the unequal sharing of valence electrons in a water molecule.

The electrons are closer to the oxygen atom because it has a partial negative charge and the hydrogen has a partial negative charge. Oxygen by itself is stronger than hydrogens. Oxygen is a negative charge pulling its negative the hydrogens are pushing the charges towards the oxygen. Pushing positive pulling negative.

name at least one way water is different from the elements that make up water.

The elements that make up water can't be split into a simpler form, but water can. Water is a liquid at room temperature, oxygen and hydrogen are gases at room temperature.

what is one way polar and non-polar molecules similar? one way they are different?

They both can dissolve in their own compound. Both attracted to their own kind. Polar molecules are partially negative and positive while nonpolar have identical elements. Nonpolar either all negative or all positive