Chapter 2: The Chemistry of Life

Question 0

Subatomic Particles that make up atoms are

Answer 0

Protons, Neutrons, and Electrons

Question 1

The Atom

Answer 1

the basic unit of matter

Question 2

Protons have what type of charge?

A. Positive
B. Negative
C. Neutral (No Charge)

Answer 2

C: Neutral or No Charge

Question 3

Protons have what type of charge?

A. Positive
B. Negative
C. Neutral (No Charge)

Answer 3

A: Positive

Question 4

A chemical Element is a ___ _____ that consists entirely of ___ type(s) of atom.

Answer 4

Pure Substance; One

Question 5

The Number of Protons in the Nucleus of an element are known as its ____ _____.

Answer 5

Atomic Number

Question 6

Atoms of the same element that differ in the number of neutrons they contain are known as ____.

Answer 6

Isotopes

Question 7

How are all of the Isotopes of an element similar?

Answer 7

Because they contain the same number of electrons, they all have the same chemical properties.

Question 8

A chemical compound is…

Answer 8

a substance formed by the chemical combo of 2 or more elements in a definite proportion.

Question 9

In what ways do compounds differ from their component elements?

Answer 9

The physical & chemical properties of a compound are usually very different from the elements which it is made up of.

Question 10

Electrons that are able to form bonds are ___ ____.

Answer 10

Valence Electrons

Question 11

What are the main types of chemical bonds?

Answer 11

Ionic Bonds and Covalent Bonds

Question 12

How is an ionic bond formed?

Answer 12

When 1 or more electrons are transferred from one atom to another.

Question 13

An Atom that loses electrons is ___ _____.

Answer 13

Positively Charged

Question 14

An atom that gains electrons has a ____ _____.

Answer 14

Negative charge

Question 15

Positively and negative charged atoms

Answer 15

Ions

Question 16

How is a covalent bond formed?

Answer 16

When electrons are shared by atoms

Question 17

A single covalent bond shares how many electrons?

Answer 17

2 electrons

Question 18

A double covalent bond shares how many eletrons?

Answer 18

4 electrons

Question 19

A triple bond shares how many electrons?

Answer 19

6 electrons

Question 20

What is a molecule?

Answer 20

The smallest unit of most Compounds;

When Atoms of the same element join together

Question 21

2.2: Water molecules are…

A. Positively Charged
B. Negatively Charged
C. Neutral

Answer 21

C. Neutral

Question 22

A molecule which is unevenly charged is

Answer 22

Polar because the molecule is a but like a magnet with 2 poles.

Question 23

The attraction between a hydrogen atom (positively charged) and another atom (negatively charged) is a ______ ____.

Answer 23

Hydrogen Bond

Question 24

Which is the weakest bond? A. Covalent Bonds B. Hydrogen Bonds C. Ionic Bonds

Answer 24

B. Hydrogen Bonds

Question 25

Cohesion

Answer 25

The attraction between molecules of the same substance. Ex. Water molecules

Question 26

Adhesion

Answer 26

The attraction between molecules of Different substances. Ex. Water and Glass molecules

Question 27

A material composed of 2 or more elements/compounds

Answer 27

A mixture

Question 28

In a mixture, the elements/compounds are A. Physically Mixed B. Chemically Mixed C. Both A and B

Answer 28

A Physically Mixed

Question 29

A components of a solution are A. Unevenly Distributed B. Evenly Distributed

Answer 29

B. Evenly Distributed

Question 30

In a saltwater solution, table salt is the A. Solvent, the substance doing the dissolving B. Solution, a type of mixture C. Solute, the substance being dissolved

Answer 30

C. Solute, the substance being dissolved

Question 31

In a saltwater solution, the water is the A. Solvent, the substance doing the dissolving B. Solution, a type of mixture C. Solute, the substance being dissolved

Answer 31

A. Solvent, the substance doing the dissolving

Question 32

How does water's polarity influence its properties as a solvent?

Answer 32

Water's polarity gives it the ability to dissolve both ionic compounds and other polar molecules.

Question 33

Mixtures that do not dissolve when placed in water, but instead they separate into tiny pieces.

Answer 33

Suspensions Ex. Blood

Question 34

The __ ____ indicates the concentration of H+ ions in a solution which ranges from 0-14.

Answer 34

pH Scale

Question 35

A pH level of 7 is A. Basic B. Acidic C. Neutral

Answer 35

C. Neutral

Question 36

A pH level of 4 is A. Basic B. Acidic C. Neutral

Answer 36

B. Acidic

Question 37

A pH level of 11 is A. Basic B. Acidic C. Neutral

Answer 37

A. Basic