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Naming Compounds And Writing Formulas- The Basics
Test Description: Prerequisite knowledge for understanding chemical nomenclature
Instructions: Answer all questions to get your test result.
1) Elements are composed of __________.
A
mixtures
B
atoms
C
cells
D
compounds
2) Two or more elements combined in a fixed proportion form _____.
A
mixtures
B
atoms
C
compounds
D
elements
3) Which of the following formulas represents a diatomic molecule?
A
Ca++
B
O2
C
C6H12O6
D
H2O
4) Elements are classified as either __________.
A
protons, neutrons or electrons
B
bright, dull and colorless
C
metals, semimetals or nonmetals
D
metallic, elemental or atomic
5) Most elements are ________.
A
metals
B
nonmetals
C
semimetals
D
gases
6) Compounds are electrically _______.
A
negative
B
positive
C
neutral
D
charged
7) An atom or group of atoms that carries an electrical charge is called a(n)_________.
A
compound
B
electron
C
ion
D
element
8) Ions are electrically charged due to a gain or loss of _______.
A
electrons
B
protons
C
neutrons
D
atoms
9) Positively charged ions are called _______.
A
onions
B
anions
C
cations
D
bunions
10) Negatively charged ions are called _______.
A
onions
B
cations
C
anions
D
bunions
11) The chemical symbol Ca2+ refers to the __________.
A
calcium ion
B
calcium compound
C
calcium atom
D
calcide ion
12) A chloride ion would be represented by the chemical formula ______.
A
Cl-
B
Cl2
C
HCl
D
Cl
13) Mn4+ is most correctly named _________.
A
magnesium ion, since manganese can assume only one oxidation state.
B
atomic manganese, since it is in the atomic state.
C
magnide ion, since manganese is only capable of a plus 4 charge.
D
manganese (IV) ion, since manganese can assume multiple oxidation states.
14) The ion, iron (II), is written as _______.
A
Fe3+
B
Fe+
C
Fe2+
D
Fe
15) Iron bromide (Fe2Br) contains how many iron atoms?
A
4
B
2
C
1
D
3
16) Binary compounds are composed of how many elements?
A
1
B
4
C
3
D
2
17) Polyatomic means _________.
A
one atom
B
two atoms
C
many atoms
D
many compounds
18) Polyatomic ions are usually ________ charged.
A
negatively
B
not
C
none of the above
D
positively
19) If you are given a formula and asked to name the compound, what should you do first?
A
Use oxidation numbers to determine how many atoms of each element are present.
B
Note whether the compound is binary or not.
C
Use prefixes and or roman numerals in the name.
D
Determine whether the compound is ionic or covalent .
20) If the name of an acid contains the prefix “hydro-“, which of the following is NOT true?
A
There is most likely a hydrogen ion involved.
B
This is an invalid question since all of the answers above ARE true.
C
It will be composed of only two elements.
D
One component of the acid is a polyatomic ion.
*select an answer for all questions
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