Bonding and Water Review

Question 1

A substance made up of two or more atoms ina fixed proportion.

Answer 1

Compound

Question 2

True or False: The properties of a compound are different from the properties of the elemnts that make up the compound.

Answer 2

True

Question 3

H₂O is a chemical _______________.

Answer 3

Formula

Question 4

How many different elements make up H₂SO₄ ?

Answer 4

Three

Question 5

How many total atoms are there in a H₂SO₄ molecule?

Answer 5

Seven

Question 6

When atoms form compounds teh ultimate goal is for all the atoms to become chemically ___________.

Answer 6

Stable

Question 7

What subatomic particles interact when bondng?

Answer 7

Electrons

Question 8

When an atom of an element is stable the outer energy level ( with the excepetion of He and H) has _________ electrons.

Answer 8

Eight

Question 9

Hydrogen only needs _______ electrons to be stable.

Answer 9

Two

Question 10

When atoms form compounds, they will do one of three things with their valence electrons. What are those three things?

Answer 10

Gain, lose or share

Question 11

The attractive force that holds the atoms of a compound together.

Answer 11

chemical bond

Question 12

The noble gases in group 18 do not naturally form compounds because their outer energy level is _________.

Answer 12

full

Question 13

This type of bond is formed between two opossitely charged ions. When one atoms gains an electron(s) and the other losses an electron(s).

Answer 13

ionic

Question 14

A positiveley charged ion is a __________.

Answer 14

cation

Question 15

A negatively charged ion is a ___________.

Answer 15

anion

Question 16

A compound is electrically neutral because it has the same number of __________ as it does __________.

Answer 16

electrons, protons

Question 17

The ability of an atom to attract bonding electrons.

Answer 17

Electronegativity

Question 18

As you go rightward and upward on the periodic table, electronegativity ___________.

Answer 18

increases

Question 19

When atoms share electrons in a bons, this is a(n) _____________ bond.

Answer 19

covalent

Question 20

___________ covalent bonds form beteen atoms of elements that have different electronegativity.

Answer 20

Polar

Question 21

____________ covalent bonds fornm between atoms of elements that are the same.

Answer 21

Nonpolar

Question 22

A __________ shows the direction of the pull of the electrons in a bond.

Answer 22

dipole

Question 23

Two shared electrons make a ____________ covalent bond.

Answer 23

single

Question 24

Four shared electrons make a _____________ covalent bond.

Answer 24

double

Question 25

Six shared electrons make a ________ covalent bond.

Answer 25

triple

Question 26

Water contains ___________ covalent bonds between hydrogen and oxygen and the overlal molecule is \_\_\_\_\_\_\_\_\_.

Answer 26

polar, polar

Question 27

The bondthat forms between water molecules is a __________ bond.

Answer 27

hydrogen

Question 28

Water has a ________ boiling point compared to other polar covalent substances due to the strong forces between the hydrogen bonds.

Answer 28

high

Question 29

Whay is water called the universal solvent?

Answer 29

It has the ability to dissolve many other like substances as well as ionic compounds

Question 30

An ionic compound breaks apart into anions and cations when dissolved in water, because they are more ___________ to water molecules than they are to one another.

Answer 30

attracted

Question 31

A property that causes like molecules to stick to one another.

Answer 31

cohesion

Question 32

A property that causes molecules of different substances to stick to one another.

Answer 32

adhesion

Question 33

water naturally forms into _____________ drops because this shape requires the least amount of energy.

Answer 33

spherical

Question 34

When water moves upward due to adhesion and cohesion.

Answer 34

capillary action

Question 35

The elastic surface of a liquid caused by the attraction of the particles to one another under the surface is called surface \_\_\_\_\_\_\_\_\_\_\_.

Answer 35

tension

Question 36

Because water has a _________ heat of vaporization it creates a "blanket" that keeps the Earth warm at night.

Answer 36

high

Question 37

The density of solid water is _________ the density of liquid water.

Answer 37

less than

Question 38

Whe water freezes the density decreases because the volume \_\_\_\_\_\_\_\_\_\_\_\_.

Answer 38

increases