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Chapter 3 Test Review - Chemical Foundations: Elements, Atoms, and Ions Flashcards | StudBud
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Chapter 3 Test Review - Chemical Foundations: Elements, Atoms, and Ions
Chapter 3 Test Review - Chemical Foundations: Elements, Atoms, and Ions
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1
Mendeleev is credited with the modern atomic theory of atoms.
True
False
2
The symbol for the element potassium is
Pt
Po
P
K
3
How many of the following not discussed in Dalton's atomic theory? isotopes, ions, p
+
, e
-
, n
0
4
5
3
2
4
How many protons, electrons, and neutrons, respectively, does an aluminum ion have?
13, 13, 14
13, 10, 27
13, 13, 27
13, 10, 14
5
Which of the following elements is an alkaline earth metal?
Fe
Na
Cu
Ca
6
In chemistry, a formula is used to represent
an element
a metal
all of these
a compound
7
Which of the following elements is most similar to chlorine?
Na
Br
He
Hg
8
Which atomic particle determines the chemical behavior of an atom?
electron
proton
nucleus
neutron
9
How many protons are in the nucleus of a Mg atom?
12
24
36
25
10
Classify the following as a metal, nonmetal, or metalloid - plutonium.
nonmetal
metalloid
metal
11
Which of these are isotopes of hydrogen?
carbon-12 and carbon-13
hydrogen-2 and helium
hydrogen-3 and hydrogen-2
potassium-42 and potassium-40
12
What is the most abundant element found in the human body?
hydrogen
carbon
oxygen
calcium
13
Which of the following is a noble gas?
H2
O2
N2
Ar
14
Which particle has the smallest mass?
helium nucleus
proton
neutron
electron
15
The avg atomic mass of N is 14.0067amu. Predict which isotope is most abundant in nature?
nitrogen-14
nitrogen-15
nitrogen-13
16
Atoms of the same element having the same atomic number but different mass numbers are called
isomers
orbitals
isotopes
neutrons
17
How many electrons are present in a tin atom with a mass number of 119?
119
69
169
50
18
An atom with 46 protons has a mass number of 102. The atom is
U
No
Pd
Ba
19
Classify the following as a metal, nonmetal, or metalloid - arsenic.
metalloid
metal
nonmetal
20
The symbol for the element chlorine is
C
Cl
Ch
C o
21
The chemical formula Al
2
O
3
indicates
two atoms of aluminum and three atoms of oxygen
five atoms of each element
six atoms of each element
three atoms of aluminum and two atoms of oxygen
22
How many protons, electrons, and neutrons, respectively, does oxygen-16 have?
8, 14, 8
8, 10, 8
8, 18, 8
8, 8, 8
23
The mass number of an atom equals
the atomic number of the element
the atomic mass of the element
the number of neutrons per atom
the number of protons plus the number of neutrons per atom
24
The first scientist to show that atoms emit tiny negative particles was
Ernest Rutherford
William Thomson
J. J. Thomson
Lord Kelvin
25
Classify the following as a metal, nonmetal, or metalloid - calcium.
metal
nonmetal
metalloid
26
The symbol for the element cobalt is
Cb
Cu
C
Co
27
How many electrons are present in a fluorine, F, atom?
10
9
11
18
28
How many electrons are present in a bromine atom with a mass number of 87?
35
87
122
80
29
A substance composed of 2 or more elements combined chemically in a fixed proportion by mass is
a mixture
a compound
an atom
a solid
30
How many hydrogen atoms are indicated in the formula (NH
4
)
2
C
8
H
4
O
2
?
20
24
8
12
31
Choose the pair in which the components have the same charge.
an electron and a neutron
a hydrogen atom and an electron
a neutron and a hydrogen atom
a proton and a hydrogen atom
32
An atom with 15 protons and 16 neutrons is an atom of
P
Pd
Ga
S
33
How many atoms are represented by one formula unit of aluminum dichromate, Al
2
(Cr
2
O
7
)
3
?
29
14
27
25
34
What is the charge on an ion with 21 protons, 25 neutrons, and 18 electrons
3+
4+
3-
4-
35
Classify the following as a metal, nonmetal, or metalloid - argon.
metal
metalloid
nonmetal
36
Choose the correct statement.
Metals make negative anions and nonmetals make + cations.
Metals make + anions and nonmetals make negative cations
Metals make negative cations and nonmetals make + anions
Metals make + cations and nonmetals make negative anions
37
Nitrogen-15 and oxygen-15 are isotopes.
False
True
38
Which of the following is a nonmetal?
calcium
cerium
carbon
cesium
39
What is the most abundant element on the earth (including the crust, oceans, and atmosphere)?
carbon
silicon
hydrogen
oxygen
40
The fundamental "particle" of a chemical element according to Dalton's theory is the
atom
compound
molecule
electron
41
An atom with 45 protons has a mass number of 100. It must contain how many neutrons?
45
55
100
145
42
Scientist whose alpha-particle scattering experiment = nucleus of atom contains dense + charge
William Thomson
J.J. Thomson
Ernest Rutherford
Lord Kelvin
43
Which of the following elements is an alkali metal?
Ca
Cu
Fe
Na
44
How many protons, electrons and neutrons respectively does iodine-127 have?
53, 53, 127
53, 53, 74
53, 74, 53
53, 127, 74
45
The atom with 68 neutrons and 50 protons has a mass number of
68
118
50
18
46
The number of protons in the nucleus of an atom is called its
isotope number
mass number
valence
atomic number
