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Chapter 5 Atomic Structure 2016 Flashcards | StudBud
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Chapter 5 Atomic Structure 2016
Chapter 5 Atomic Structure 2016
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Unit 3
Flashcards
35 cards
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Practice quiz
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Questions
35
Answers
1
An atom of potassium has 19 protons and 20 neutrons. What is the mass number?
19
10
39
20
2
The relative abundance of Fe-55 is 15% and mass of 55 amu. Fe-56 is 85% and amu of 56:
55.85 amu
52.55 amu
50.45 amu
111 amu
3
Atoms of the same element that have different masses are called:
neutrons
nuclides
moles
isotopes
4
Which of the following categories includes the majority of the elements?
nonmetals
metalloids
liquids
metals
5
Which of the following elements is in the same period as phosphorus?
carbon
magnesium
nitrogen
oxygen
6
Zn-66 (atomic number 30) has
33 neutrons
30 neutrons
96 neutrons
36 neutrons
7
If chlorine has a mass of 35 and an atomic number of 17, how many neutrons does it have?
35
18
34
17
8
Using the periodic table from above, how many electrons are in Al
+3
13
14
10
16
9
A positively charged particle with a mass of 1.673 x 10
-24
g is a(n):
electron
positron
proton
neutron
10
The atomic mass listed in the periodic table is the
relative atomic mass of the most abundant isotope
mass number of the most abundant isotope
relative atomic mass of the most stable radioactive isotope
average atomic mass
11
Which is the number of neutrons in
80
Br?
115
35
80
45
12
The total number of protons and neutrons in the nucleus of an atom is its:
Avogadro's constant
atomic number
mass number
number of neutrons
13
Which scientist described a positively charged substance with electrons dispersed throughout?
Chadwick
Bohr
Rutherford
Thomson
14
The box for an element from the periodic table is shown. Which is the atomic mass?
12.011
Carbon
C
6
15
Argon (atomic number 18 and mass number 40) has _____ protons in its nucleus.
22
9
40
18
16
What element has 14 protons?
Nitrogen
Silicon
Sulfur
Aluminum
17
The box for an element from the periodic table is shown. Which is the atomic number?
Carbon
6
C
12.011
18
Who was the schoolmaster who studied chemistry and proposed an atomic theory?
Robert Brown
Dmitri Mendeleev
John Dalton
Jons Berzelius
19
Sodium has an atomic number of 11 and mass of 22, how many electrons does a neutral atom have?
23
12
11
22
20
Which is the correct symbol for the atom with 42 protons and 49 neutrons?
Molybdinum-49
Indium-49
Molybdinum-91
Indium-91
21
What is the smallest part of an element that retains the properties of the element?
neutron
atom
proton
electron
22
In the figure above, a neutral atom of silicon contains:
28.09 electrons
38 electrons
14 electrons
16 electrons
23
An atom is electrically neutral because
the numbers of protons and electrons are equal
the numbers of protons and neutrons are equal
nuclear forces stabilize the charges
neutrons balance the protons and neutrons
24
A nuclear particle that has about the same mass as a proton, but with no electrical charge:
isotope
electron
neutron
nuclide
25
Most of the volume of an atom is occupied by the:
nucleus
electron cloud
nuclides
protons
26
Which region contains the alkaline earth metal family or group of elements?
Purple
Orange
Dark Blue
Red
27
The atomic number of oxygen, 8, indicates that there are eight:
neutrons outside the oxygen atom's nucleus
energy levels in the oxygen atom's nucleus
protons in the nucleus of an oxygen atom
oxygen nuclides
28
Which of the following is the halogen that is in Period 5?
Bromine (Br)
Xenon (Xe)
Strontium (Sr)
Iodine (I)
29
Using the periodic table from above, how many electrons are in Cl
-1
?
18
16
35
17
30
What is the atomic number for aluminum from the figure above?
13
26.9815
14
26.98
31
The nucleus of most atoms is composed of:
tightly packed protons and neutrons
loosely connected protons and electrons
tightly packed neutrons
tightly packed protons
32
Chlorine has atomic number 17 and mass number 35. It has:
17 protons, 17 electrons, and 52 neutrons
18 protons, 18 electrons, and 17 neutrons
17 protons, 17 electrons, and 18 neutrons
35 protons, 35 electrons, and 17 neutrons
33
Which scientist described a positively charged nucleus in the middle of a lot of empty space?
Rutherford
Chadwick
Bohr
Thomson
34
Which two are isotopes of one another?
O & Q
N & O
N & Q
L & P
35
What is the number of protons in
56
Fe?
56
30
82
26
