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