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