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Chapter 2: Chemestry

Total questions: 96

Worksheet time: 2hrs 2mins

Name
Class
Date
1.

What is matter



(a)  

2.

What is element?

(a)  

3.

Elements that are needed by the human body

a)

Bulk elements

1.

Large amounts needed

b)

Trace elements

2.

Small amounts needed

c)

Ultratrace elements

3.

Very minute amounts

4.

needed elements in the human body

4 lines
5.

what are the four most abundant elements?

4 lines
6.

Match the following

a)

oxygen

1.

O

b)

Carbon

2.

C

c)

Hydrogen

3.

H

d)

Nitrogen

4.

N

e)

Calcium

5.

CA

7.

Match the following

a)

Phosphorus

1.

P

b)

Potassium

2.

K

c)

Sulfur

3.

S

d)

Chlorine

4.

CI

e)

sodium

5.

Na

8.

Match the following

a)

Magnesium

1.

Mg

b)

Cobalt

2.

Co

c)

copper

3.

Cu

d)

Fluorine

4.

F

e)

Iodine

5.

I

9.

Match the following

a)

Maganese

1.

Mn

b)

Zinc

2.

Zn

c)

Cobalt

3.

Co

d)

Copper

4.

Cu

10.

Example of an ultratrace element

(a)  

11.

what is an atom?

4 lines
12.

Basic parts of an atom

a)

Proton

1.

large particle that Carries a single positive charge.

b)

Neutron

2.

large particle that Carries no electrical charge.

c)

electron

3.

small particle Carries a single negative charge.

d)

Nucleus

4.

Central part of the atom, composed of protons and neutrons, electrons move around the nucleus.

13.

What is the atomic weight?

a)

The number of protons plus the number of neutrons in one atom, Electrons do not contribute to the weight of the atom because they are so light.

b)

Number of protons in the nucleus of an atom of a specific element. Each element has a unique atomic number. Number of protons is equal to the number of electrons in the atom; atoms are electrically neutral.

c)

Relatively large particle within an atom; carries a positive electrical charge and is found within an atomic nucleus.

d)

Extremely small particle within an atom; almost no weight; carries a negative electrical charge and is in constant motion around an atomic nucleus.

14.

What is the atomic weight?

4 lines
15.

What is the atomic number?

a)

Relatively large particle within an atom; carries a positive electrical charge and is found within an atomic nucleus.

b)

The number of protons plus the number of neutrons in one atom, Electrons do not contribute to the weight of the atom because they are so light.

c)

Number of protons in the nucleus of an atom of a specific element. Each element has a unique atomic number. Number of protons is equal to the number of electrons in the atom; atoms are electrically neutral.

d)

Particle, formed from an atom, that is electrically charged because it has gained or lost one or more electrons.

16.

What is the atomic number

4 lines
17.

what are protons?

a)

Relatively large particle within an atom; about the same weight as a proton; uncharged and thus electrically neutral; found within an atomic nucleus.

b)

The number of protons plus the number of neutrons in one atom, Electrons do not contribute to the weight of the atom because they are so light.

c)

Particles formed by the chemical union of two or more atoms.

d)

Relatively large particle within an atom; carries a positive electrical charge and is found within an atomic nucleus.

18.

What is a proton?

4 lines
19.

What is an electron

a)

Extremely small particle within an atom; almost no weight; carries a negative electrical charge and is in constant motion around an atomic nucleus.

b)

Relatively large particle within an atom; about the same weight as a proton; uncharged and thus electrically neutral; found within an atomic nucleus.

c)

Particle, formed from an atom, that is electrically charged because it has gained or lost one or more electrons.

d)

Particles formed by the chemical union of two or more atoms.

20.

what is a neutron

a)

Particles formed by the chemical union of two or more atoms.

b)

Relatively large particle within an atom; about the same weight as a proton; uncharged and thus electrically neutral; found within an atomic nucleus.

c)

 Extremely small particle within an atom; almost no weight; carries a negative electrical charge and is in constant motion around an atomic nucleus.

d)

Particle, formed from an atom, that is electrically charged because it has gained or lost one or more electrons

21.

what is an Ion

a)

Particles formed by the chemical union of two or more atoms.

b)

Extremely small particle within an atom; almost no weight; carries a negative electrical charge and is in constant motion around an atomic nucleus.

c)

Particle, formed from an atom, that is electrically charged because it has gained or lost one or more electrons

d)

Relatively large particle within an atom; about the same weight as a proton; uncharged and thus electrically neutral; found within an atomic nucleus.

22.

What is a molecule?

a)

Extremely small particle within an atom; almost no weight; carries a negative electrical charge and is in constant motion around an atomic nucleus.

b)

Particles formed by the chemical union of two or more atoms.

c)

Particle, formed from an atom, that is electrically charged because it has gained or lost one or more electrons

d)

Relatively large particle within an atom; about the same weight as a proton; uncharged and thus electrically neutral; found within an atomic nucleus.

23.

how to draw an atom if you are given the atomic number and the atomic weight?

4 lines
24.

What is an Isotope?

4 lines
25.

1. Isotopes contain different numbers of neutrons, but the same number of protons & electrons.

2. Oxygen often forms Isotopes

3. Radioactive isotopes are unstable, releasing energy or atomic fragments (atomic radiation) until they gain stability; some are used to detect and treat disease.

4. For any element, the atomic weight is often considered the average of the atomic weights of all of its isotopes.

5. Radioactive isotopes can be used to destroy cancerous thyroid gland tissue, and its medical uses is detecting coronary blood vessels disorders and evaluating the kidney, changes in bone density.

a)

false

b)

true

c)

false

d)

true

26.

Radioactive isotopes can be used to destroy cancerous thyroid gland tissue, and its medical uses is detecting coronary blood vessels disorders and evaluating the kidney, changes in bone density.

a)

true

b)

false

c)

false

d)

true

27.

Isotopes contain different numbers of protons and electrons but the same number of neutrons.

a)

false

b)

true

c)

false

d)

true

28.

For any element, the atomic weight is often considered the average of the atomic weights of all of its isotopes.

a)

false

b)

true

c)

false

d)

true

29.

what is an electron?

4 lines
30.

What is a neutron?

4 lines
31.

How do atoms combine together?

4 lines
32.

Tree examples of a trace element

(a)  

33.

What is a molecule and give an example of how they work?

4 lines
34.

What is a compound and how do they work?

4 lines
35.

Match the following

a)

a molecule of hydrogen

1.

H2

b)

a molecule of glucose

2.

C6 H12 O6

c)

a molecule of water

3.

H2O

36.

What is an Ion ?

4 lines
37.

A Cation is a ​ (a)   charged ion​ and Forms when an atom ​ (b)   (c)  

Choose from the below words
Positive
loses
electrons.
negative
neutrons
protons
gains
38.

An Anion is a ​ (a)   charged ion and forms when an atom ​ (b)   ​ (c)  

Choose from the below words
negatively
gains
electrons.
positively
loses
neutrons
protons
39.

An example of an Ion

4 lines
40.

the types of bonds that form when atoms combine?

(a)  

41.

What is an ionic bond?

4 lines
42.

An example of an ionic bond

(a)  

43.

What is a covalent bond?

4 lines
44.

An example of covalent bond?

(a)  

45.

Match the following

a)

Hydrogen ions form

1.

single bonds

b)

Oxygen atoms form

2.

two bonds

c)

Nitrogen atoms form

3.

three bonds

d)

Carbon ions form

4.

four bonds

46.

What is a polar bond or molecule?

4 lines
47.

hydrogen bond?

4 lines
48.

The four chemical reactions

4 lines
49.

what is synthesis chemical reaction?

4 lines
50.

What is a decomposition chemical reaction?

4 lines
51.

What is an exchange chemical reaction?

4 lines
52.

What is a reversible chemical reaction?

4 lines
53.

Match the following

a)

Reactants

1.

are the starting materials of a chemical reaction: the atoms, ions, or molecules.

b)

Reactants

2.

are the starting materials of a chemical reaction: the atoms, ions, or molecules.

c)

Products

3.

are substances formed at the end of the chemical reaction.

d)

Products

4.

are substances formed at the end of the chemical reaction.

54.

What is pH?

4 lines
55.

What is a neutral ph?

(a)  

56.

What is acid?

a)

Substances that release ions in water. The solution can conduct an electric current, so it is called an electrolyte.

b)

Electrolytes that dissociate to release hydrogen ions in water.

c)

Substances that release ions that can combine with hydrogen ions.

d)

Electrolytes formed by the reaction between an acid and a base.

57.

what is base?

a)

Electrolytes formed by the reaction between an acid and a base.

b)

Substances that release ions in water. The solution can conduct an electric current, so it is called an electrolyte.

c)

Substances that release ions that can combine with hydrogen ions.

d)

Electrolytes that dissociate to release hydrogen ions in water.

58.

what is acid and base?

4 lines
59.

what are electrolytes?

a)

Substances that release ions in water. The solution can conduct an electric current, so it is called an electrolyte.

b)

Electrolytes that dissociate to release hydrogen ions in water.

c)

Electrolytes formed by the reaction between an acid and a base.

d)

Substances that release ions that can combine with hydrogen ions.

60.

what are salts?

a)

Electrolytes that dissociate to release hydrogen ions in water.

b)

Substances that release ions that can combine with hydrogen ions.

c)

Substances that release ions in water. The solution can conduct an electric current, so it is called an electrolyte.

d)

Electrolytes formed by the reaction between an acid and a base.

61.

What does it mean a neutral pH?

4 lines
62.

Human body blood pH ranges from?

(a)  

63.

Match the following

a)

Alkalosis

1.

occurs when blood p H rises to 7.5 through 7.8

b)

Acidosis

2.

occurs when blood p H drops to 7.0 through 7.3

c)

Acidosis

3.

Makes a person feel disoriented, fatigued

d)

Alkalosis

4.

Makes a person feel dizzy and agitated.

64.

water is a polar covalent bond?

a)

true

b)

true

c)

false

d)

false

65.

Why is water so unique?

(discussion question)

4 lines
66.

why do we need oxygen?

(discussion question)

4 lines
67.

 The difference between an inorganic substance and an organic substance?

4 lines
68.

Match the following

a)

organic

1.

carbohydrates

b)

inorganic

2.

water

c)

organic

3.

proteins

d)

inorganic

4.

oxygen

e)

organic

5.

lipids

69.

Match the following

a)

inorganic

1.

carbon dioxide

b)

organic

2.

protein

c)

organic

3.

nucleic acids

d)

inorganic

4.

inorganic salts

e)

organic

5.

lipids

70.

Match the following

a)

Carbon

1.

major element

b)

hydrogen

2.

major element

c)

chlorine

3.

major element

d)

fluorine

4.

trace element

e)

iodine

5.

trace element

71.

Match the following

a)

mangenese

1.

trace element

b)

sodium

2.

major element

c)

sulfur

3.

major element

d)

magnesium

4.

major element

e)

fluorine

5.

trace element

72.

what elements contains a carbohydrate?

(a)  

73.

what elements contain a lipid or fat?

(a)  

74.

what elements contain a protein?

(a)  

75.

The function of a carbohydrate in the body? and some examples of what we eat?

4 lines
76.

What is a complex carbohydrate?

a)

Monosaccharides

b)

Polysaccharides

c)

Disaccharides

77.

what is a simple carbohydrate?

a)

Disaccharides

b)

Monosaccharides

c)

Polysaccharides

78.

examples of complex and simple carbohydrates:

4 lines
79.

What are fats and lipids made of? give examples

4 lines
80.

The chemical term for fats

(a)  

81.

The difference between Saturated fat and unsaturated fat.

4 lines
82.

the meaning of the term polyunsaturated fat?

4 lines
83.

The important groups of lipids and the uses in the body?

4 lines
84.

The main steroid in the body?

(a)  

85.

 the building blocks of proteins, the uses of proteins in our body, and some sources of proteins in our diet?

4 lines
86.

Two examples of amino acids

(a)  

87.

amino acids are hold together by what?

(a)  

88.

How proteins are different from carbs and fat?

4 lines
89.

How to denature a protein? Can you recognize a structural drawing of a protein? 

4 lines
90.

Match the following

a)

Primary

1.

Amino acids sequence

b)

Secondary

2.

twisted structure formed by hydrogen bonding between nonadjacent amino acids

c)

Tertiary

3.

Unique 3-dimensional folded shape of the protein

d)

Quaternary

4.

Structure formed by proteins, when 2 or more polypeptide chains are connected to become 1 protein

91.

Four basic shapes of protein

4 lines
92.

  the type of bond that holds a protein in its unique shape?

(a)  

93.

an example of a protein with a quaternary structure

(a)  

94.

Clinical applications – CT Scanning and PET Imaging

4 lines
95.

Nucleic acids

4 lines
96.

The difference between DNA and RNA

4 lines

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