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WorksheetsA&P Chapter 2 Test
Total questions: 40
Worksheet time: 26mins
Understanding (a) is essential for understanding anatomy and physiology because body structures and functions result from chemical changes.
Which of the following substances is not an element?
Iron
Oxygen
Water
Carbon
Hydrogen
Matter is anything that has weight and takes up space.
True
False
Which elements make up 95% (by weight) of the human body?
carbon, hydrogen, oxygen, nitrogen
carbon, hydrogen, oxygen, calcium
carbon, hydrogen, calcium, nitrogen
carbon, hydrogen, selenium, sodium
The number of protons in the atoms of a particular element is called the element’s _______.
Atomic mass
Atomic number
Atomic weight
The atomic weight of an atom of an element equals the number of _______ in its nucleus.
protons
neutrons
electrons
protons & neutrons
Each element is composed of characteristic tiny particles called (a) .
The parts of an atom that lack an electrical charge are called (a) .
When atoms combine with other atoms, interactions occur between their (a) shells.
Name a major element.
(a)
Name a minor element.
(a)
Atoms that gain or lose an electron and become electrically charged are called _____.
elements
ions
cells
molecules
The type of chemical bond formed when atoms share electrons is called ________.
ionic
covalent
hydrogen
The formula H2O means
an atom contains
2 hydrogen molecules and 1 oxygen molecule.
an atom contains
1 hydrogen atom and 2 oxygen molecules.
a molecule
contains 2 hydrogen atoms and no oxygen atoms.
a molecule
contains 2 hydrogen atoms and 1 oxygen atom.
If two pairs of electrons are shared, the resulting bond is called a double covalent bond.
True
False
The type of chemical bond formed when ions with opposite electrical charges are attracted to one another is called
ionic
covalent
hydrogen
The attraction of the positive hydrogen end of a polar molecule to the negative nitrogen or oxygen end of another polar molecule is called a(an)
ionic bond.
covalent bond.
hydrogen bond.
A ________ formula represents the numbers and types of atoms in a molecule.
strcutural
molecular
A _______ formula shows how atoms are joined and arranged in various molecules.
molecular
structural
A _______ reaction is symbolized as A+B→AB.
decomposition
exchange
synthesis
A _______ reaction is symbolized as AB→A+B.
Decomposition
Exchange
Synthesis
A chemical reaction in which pairs of two different molecules trade positions is called a(an) _________ reaction.
decomposition
exchange
synthesis
A pH value indicates the hydrogen ion concentration in solutions, including body fluids.
True
False
The pH scale ranges from 0 to 14.
True
False
A pH of (a) is the midpoint of the pH scale and signifies equal numbers of hydrogen and hydroxide ions.
A solution that contains more hydrogen ions than hydroxide ions is ______.
acidic
basic
neutral
A solution that contains more hydroxide ions than hydrogen ions is ______.
acidic
basic
neutral
Substances that release ions when dissolved in water are called ________.
electrolytes
inorganic
nonelectrolytes
organic
Chemicals that resist changes in pH are called _______.
acids
bases
buffers
electrolytes
Which of the following chemicals is not an inorganic substance?
water
protein
sodium chloride
carbon dioxide
oxygen
Organic substances always contain the elements ______ and ______.
(a)
(a) is the most abundant compound in living material and accounts for 2/3 of the weight of an adult human.
Which of the following is not organic?
carbohydrate
protein
lipid
carbon dioxide
nucleic acid
Steroid molecules have four connected rings of carbon atoms.
True
False
The building blocks of proteins are amino acids.
True
False
(a) are the building blocks of nucleic acids.
Carbohydrate atoms usually have ______ hydrogen atoms as compared to oxygen atoms?
twice as many
ten times as many
three times as many
the same
______ catalyze specific chemical reactions, allowing them to occur faster than if the they were not present.
Carbohydrates
Enzymes
Lipids
Proteins
BONUS: Leonardo da Vinci's 'Mona Lisa" hangs in what museum?
(a)
BONUS: What country is the largest in the world?
(a)
