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Atomic Structure Test Review, A.King Flashcards | StudBud
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Atomic Structure Test Review, A.King
Atomic Structure Test Review, A.King
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Test review for General Chemistry test over atomic ststructreu
Flashcards
40 cards
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Practice quiz
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Questions
40
Answers
1
A negatively charged subatomic particle is the
neutron
proton
electron
nucleus
2
The atomic number of an element is the total number of which particles in the nucleus?
protons & electrons
electrons
neutrons
protons
3
How is the number of neutrons in the nucleus of an atom calculated?
Subtract the number of protons from the mass number
Add the number of electrons and protons
Subtract the number of electrons from the number of protons
Add the mass number fo the number of electrons.
4
The smallest particle of an element that retains the properties of that element
proton
electron
nucleus
atom
5
The particles that are found in the nucleus of an atom are ______.
protons and neutrons
protons and electrons
neutrons and electrons
electrons only
6
The number of protons in the nucleus of an element is the
atomic mass number
atomic number
atomic mass
mass number
7
Which of the following is true about subatomic particles?
Electrons are negatively charged and are the heaviest
neutrons have no charge and are the lightest particle
protons are positively charged and the lightest particle
the mass of a neutron nearly equals the mass of a proton
8
Isotopes of the same element have different ____.
atomic numbers
mass numbers
chemical behavior
positions on the periodic table
9
How many p
+
, e
-
, and n does an atom with atomic number 50 and mass number 125 contain?
120 neutrons, 50 protons, 75 electrons
75 electrons, 50 protons, 50 neutrons
50 protons, 50 electrons, 75 neutrons
70 neutrons, 75 protons, 50 electrons
10
Who was the man who lived from 460 B.C. - 370 B.C.; among first to suggest the idea of atoms?
Dalton
Democritus
Thomson
Atomos
11
Which of the following is NOT a part of Dalton's atomic theory?
Atoms are always in motion.
Atoms of the same element are identical.
All elements are composed of atoms.
Atoms that combine do so in simple wholenumber ratios.
12
The atomic mass of an element is the ____.
weighted average of the isotopes of the element.
total of subatomic particles in its nucleus.
avg of the mass # and the atomic # for the element.
total mass of the isotopes of the element
13
In which of the following is the symbol, the # of p
+
, and the # of e
-
given correctly?
Zn, 30 protons, 60 electrons
In, 49 protons, 49 electrons
F, 19 protons, 19 electrons
Cs, 55 protons, 132.9 electrons
14
In which of the following is the number of neutrons correctly represented?
2412 Mg has 24 neutrons
7533As has 108 neutrons
23892 U has 146 neutrons
199F has 0 neutrons
15
The sum of protons and neutrons in an atom equals the ___.
atomic number
mass number
atomic mass
nucleus number
16
The mass number of an element is equal to ____.
less than twice the atomic number
a constant number for the lighter elements
the total number of protons and neutrons in the nucleus
the total number of electrons in the nucleus
17
Which of the following statements is NOT true?
Atoms are mostly empty space.
Atoms of isotopes of an element have different numbers of p+
Atoms of the same element can have different masses.
The nucleus of an atom has a positive charge.
18
Why use relative masses of atoms compared to a reference isotope instead of the actual masses?
The number of subatomic particles in atoms varies.
The actual mass of an electron is large compared to proton.
The actual masses of p+ , e- and n are not known.
The actual masses of atoms are very small and hard to work w
19
Isotopes of the same element have different ____.
numbers of electrons
numbers of neutrons
atomic numbers
numbers of protons
20
All atoms of the same element have the same ____.
mass numbers
mass
number of neutrons
number of protons
21
Atoms with the same number of protons but different number of neutrons in the nucleus are
mass number
atomic number
atomic mass unit
isotopes
22
Using the periodic table, determine the number of neutrons in
16
O.
24
8
4
16
23
Which of thes isotopes of the following sets of symbols represents isotopes of the sameelement?
9142 J 9242 J 9340 J
13859Q 13355Q 13354Q
5019 L 5020 L 5021 L
8438 M 8638 M 8738 M
24
The central part of an atom, containing protons and neutrons is
neutron
nucleus
electron
proton
25
What unit is used to measure weighted average atomic mass?
gram
nanogram
angstrom
amu
26
Dalton said that atoms are indivisible & all atoms of an element are identical. Now we know
atoms of an element can have different numbers of protons.
atoms are divisible.
all of Dalton's hypotheses are correct.
all atoms of an element aren't identical but have same mass.
27
All atoms are ____.
positively charged,with the # of p exceeding the number of e
negatively charged, with the of e exceeding the number of p
neutral, with protons equal to electrons equal to neutrons
neutral with electrons equal to electrons
28
An element has an atomic number of 76. The number of protons and electrons in a neutral atom is
38 p & 38 e
76 p & 0 e
152 p & 76 e
76 p & 76 e
29
Which of the following isotopes has the same number of neutrons as phosphorus-31?
3215 P
2914 Si
3216 S
2814 Si
30
The total number of protons and neutrons in the nucleus of an atom is the
mass number
atomic number
atomic mass
atomic mass unit
31
Which of the following is necessary to calculate the atomic mass of an element?
the atomic mass of e relative masses of carbon-12
the relative masses of the element's protons and neutrons
the masses of each isotope of the element
the atomic number of the element
32
What does the number 84 in the name krypton-84 represent?
the sum of protons and electrons
the mass number
the atomic number
twice the number of protons
33
Which of the following equals one atomic mass unit?
the mass of one electron
one-twelfth the mass of one carbon-12 atom
the mass of one carbon -12 atom
the mass of one helium-4 atom
34
Which of the following was originally a tenet of Dalton's atomic theory, but had to be revised?
Atoms of the same element are identical.
Compounds are made by combining atoms.
Atoms are tiny indivisible particles.
Atoms that combine do so in simple whole-number ratios.
35
As a result of Rutherford's discovery of the nucleus, which model of the atom is thought to be
p+, e-, and n are evenly distributed throughout the atom
The nucleus is made of electrons and protons
e-are distributed around the nucleus & occupy most of space
the nucleus is made of protons, neutrons and electrons
36
A subatomic particle with no charge is the
electron
neutron
proton
nucleus
37
A positively charged subatomic particle is the
nucleus
electron
proton
neutron
38
The atomic mass of an element depends upon the ____.
mass of each isotope of that element
mass and relative abundance of each isotope of that element
relative abundance of protons in that element
mass of each electron in that element
39
Which of the following is
NOT
true?
The nucleus of an atom is positively charged.
Electrons are negatively charged and have a mass of 1 amu.
Neutrons are located in the nucleus of an atom.
Protons have a positive charge
40
Dalton's atomic theory included which idea?
All atoms of all elements are the same.
Individual atoms can be seen with a microscope.
Atoms of the same element are always identical.
Atoms of different elements combine in 1to1 ratios.
