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Atoms Quiz
Atoms Quiz
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atomic theory and structure
Flashcards
43 cards
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Questions
43
Answers
1
In Bohr's model of the atom, how many electrons can fit into the second energy level?
6
8
4
2
2
Which of the following symbols represents an arsenic atom that has gained three electrons?
As-3
As+3
Ar-3
Ar+3
3
How many electrons are in Sr
+2?
40
87
36
38
4
The mass number of the atom show here is ____.
4
3
10
7
5
Which of the following sets of atoms are isotopes of one another?
magnesium-23 and manganese-55
oxygen-16 and oxygen-18
lithium-7 and beryllium-7
nitrogen-14 and carbon-14
6
Which law explains why water is always two parts hydrogen and one part oxygen?
the law of multiple proportions
the law of conservation of mass
the law of conservation of energy
the law of definite proportions
7
How can you determine the mass number of an atom?
protons + electrons
protons - neutrons
double the number of protons
protons + neutrons
8
How can you determine how many neutrons are in an atom?
mass number + electrons
same as the atomic number
same as the mass number
mass number - protons
9
An ion is an atom that has lost or gained _____.
electrons
neutrons
protons
power
10
What is the atomic number of iron-56?
26
56
30
53
11
Determine the number of neutrons in
201
Hg
+2
.
78
82
121
201
12
Determine the number of neutrons in
80
Br?
45
79.9
44
35
13
The "plum pudding" model of that atom was presented by ____.
Rutherford
Chadwick
Thomson
Dalton
14
The first atomic theory was presented by ____.
Dalton
Thomson
Aristotle
Democritus
15
What is the daughter atom when strontium-90 undergoes beta decay?
rubidium-90
krypton-86
strontium-89
yttrium-90
16
Which type of radioactivity is shown here?
both alpha and beta
alpha
beta
gamma
17
Isotopes are atoms of the same element with different ______.
atomic numbers
numbers of electrons
mass numbers
electronic charges
18
What subatomic particle(s) are in the nucleus?
electrons
protons only
protons and electrons
protons and neutrons
19
How many electrons are in Mg
+2
?
10
12
22
14
20
What is the ion symbol for an element that has 30 protons and 28 electrons
Zn+2
Zn-2
65Zn
Zn
21
A positive ion is a(n) ______.
nuclide
anion
cation
isotope
22
What is the mass number of chlorine-37?
17
37
20
35.4527
23
How many neutrons are in argon-38?
18
38
20
22
24
Whose model of the atom is shown here?
Bohr
Thomson
Rutherford
Dalton
25
How did Bohr modify Rutherford's model of the atom?
added neutrons to the nucleus
added electrons to the nucleus
placed electrons in energy levels
stated that some atoms are radioactive
26
Which type of radioactivity is shown here?
alpha decay
gamma radiation
both alpha and gamma
beta decay
27
How many electrons are in N
-3
?
14
10
4
7
28
The nucleus of the atom was discovered by ______.
Neils Bohr
John Dalton
James Chadwick
Ernest Rutherford
29
Who was the first person to propose that all matter is made of atoms?
Aristotle
Democritus
Thomson
Dalton
30
Which type(s) of radioactivity results in a change in the identity of the atom/element?
both alpha and beta
beta
gamma
alpha
31
What is an alpha particle?
a fast moving electron
an electron and an antineutrino
two protons and two neutrons
a beam of energy
32
Which of the following symbols represents an isotope with 14 p
+
, 18 e
-
, and 14 n
o
?
28Si-4
32Ar-4
28Si+4
28Ar+4
33
Which of the symbols below represents and element with 46 protons and 59 neutrons?
59Pd
46Pb
105Pb
105Pd
34
How did the O
-2
ion get its charge?
lost two electrons
lost two protons
gained two electrons
gained two protons
35
How many protons, neutrons, and electrons are in
7
Li
+1
?
3 protons, 3 electrons, 4 neutrons
7 protons, 10 electrons, 4 neutrons
3 protons, 2 electrons, 4 neutrons
7 protonts, 7 electrons, 3 neutrons
36
What did the gold-foil experiment tell us about the atom?
electrons are attracted to protons
electrons are negatively charged
atoms are mostly empty space
neutrons are in the nucleus
37
This element has 25 protons in its nucleus?
magnesium
iron
manganese
molybdenum
38
How many protons and neutrons are in
209
Pb?
82 protons and 127 neutrons
82 protons and 82 neutrons
82 neutrons and 127 protons
82 protons and 125 neutrons
39
Which of the symbols below represents an atom with 24 protons and 22 electrons?
Ti-2
Cr-2
Ti+2
Cr+2
40
In this type of radioactivity, the nucleus releases beams of intense energy.
gamma
none of these
alpha
beta
41
How many electrons can fit in the third energy level?
18
16
20
14
42
A negative ion is called a(n) ____.
proton
anion
electron
cation
43
Which atom has 47 protons?
argon
silver
gold
titanium
