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Ch 04 & 05 Review Flashcards | StudBud
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Ch 04 & 05 Review
Ch 04 & 05 Review
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1
The ______________of an element is the number of protons in the nucleus.
mass number
density
atomic mass
atomic number
2
Which of the following is unique for every element on the Periodic Table?
number of isotopes
atomic number
mass number
atomic mass
3
The region in which an electron is most likely to be found is a(n) ___.
nucleus
column
energy level
proton
4
Which of the following statements is true for neutrons? Select all that apply.
Neutrons are located in the nucleus of an atom.
Neutrons have a mass of a slightly more than 1 amu.
The number of neutrons for a given atom can vary.
Neutrons have a neutral charge.
5
Thomson envisioned atoms as...
...mostly positive charges, with negative charges scattered through it.
...a small, central nucleus with orbiting electrons.
...solid, hard spheres.
6
Metalloids have properties of both metals and nonmetals.
True
False
7
Which of the following statements is true for electrons? Select all that apply.
Electrons orbit the nucleus.
Electrons have a mass of about 1/2000 of a proton.
Electrons have a negative charge.
8
A neutral subatomic particle that is found in the nucleus of an atom.
proton
neutron
electron
quark
9
The nucleus of an atoms is made up of ___.
protons and neutrons
electrons and protons
neutrons and electrons
10
Which of the following statements is true for protons? Select all that apply.
Protons have a positive charge.
Protons have a mass of 1 amu.
The number of protons for a given atom is constant.
Protons are located in the nucleus of an atom.
11
Chemical symbol for Tungsten.
Ta
Ag
W
Pb
12
Moving from left to right across a row of the periodic table, atomic size ___.
remains the same
decreases
increases
13
Which of the following statements are true for metals?
Most metals are ductile.
Most metals are brittle
Most metals are liquids at room temperature
Most metals are good conductors of electricity
Most metals are malleable
14
Negatively-charged subatomic particle that is found in the space outside the nucleus.
proton
positron
neutron
electron
15
Dalton envisioned atoms as...
...solid, hard spheres.
...a small, central nucleus with orbiting electrons.
...mostly positive charges, with negative charges scattered through it.
16
Negatively-charged subatomic particle that is found in the space outside the nucleus.
Electron
Proton
Neutron
Ion
17
Rutherford envisioned atoms as...
...a small, central nucleus with orbiting electrons.
...mostly positive charges, with negative charges scattered through it.
...solid, hard spheres.
18
Democritus thought that matter was made of tiny particles...
...that could be divided.
...that could not be divided.
...that were all round and smooth.
...of earth, air, fire, and water.
19
Which of the following is NOT part of Dalton's Atomic Theory?
All elements are composed of atoms.
In a particular compound, atoms of different elements combine in same way.
Electrons travel around the nucleus in fixed energy levels
Compounds contain atoms of more than one element.
20
When Mendeleev organized elements in his periodic table, elements with similar ___ properties were in same column/group.
metallic
chemical
nonmetallic
physical
21
Which of the following were observed during Rutherford's Gold Foil experiment? Select all that apply.
Most alpha particles deflected back in direction from which they were shot.
A few of the alpha particles got deflected at small angles.
Most of the alpha particles passed straight through the atom.
22
According to Rutherford’s model, all of an atom’s positive charge is concentrated outside its nucleus.
False
True
23
Electrons with ___ energy are found further from the nucleus of an atom.
less
more
24
Elements that are good conductors of electric current and heat
metals
metalloids
isotopes
nonmetals
25
Who provided evidence for the existence of a nucleus in an atom?
Democritus
John Dalton
Ernest Rutherford
J.J. Thomson
26
In Thomson's cathode ray tube experiment, he discovered that the cathode ray was...
...attracted to the negative plate and repelled by the positive plate.
...attracted to the positive plate and repelled by the negative plate.
...attracted to both the positive and negative plates.
27
Who first taught the idea that atoms are the fundamental particles from which all matter is made?
Dalton
Thompson
Bohr
Democritus
28
An atom with the same number of protons but a different number of neutrons is called an isotope.
True
False
29
Which of the following most accurately represents John Dalton’s model of the atom?
a hollow sphere with a dense nucleus
a tiny, solid sphere with a predictable mass for a given element
a tiny, solid sphere with an unpredictable mass for a given element
a sphere that is hollow throughout
30
Elements in the same group have similar chemical properties
False
True
31
Bohr's model of the atom changed the view on where electrons were placed in the atom. He showed that electrons...
...orbit the nucleus.
...are found within the nucleus.
32
An electron that has jumped from energy level 3 to 4 has _____________ energy.
lost
gained
destroyed
created
33
Although lithium and neon are both in Period 2 of the periodic table, they have very different properties because...
...they are found in different rows.
...they are found in different corneres.
...they are found in different columns.
...they are found in different periods.
34
Electrons with ___ energy are found closer to the nucleus of an atom.
more
less
35
In an atom, ________ and __________ are found in the nucleus.
isotopes
electrons
protons
neutrons
36
Greek philosopher who believed that all matter consisted of extremely small particles that could not be divided.
Socrates
Aristotle
Democritus
Plato
37
Which statement accurately represents the arrangement of electrons in Bohr’s atomic model?
Electrons orbit the nucleus like planets orbit the sun
Electrons fly away from the nucleus
Electrons move randomly around the nucleus
Electrons vibrate in fixed locations around the nucleus.
38
Electrons can exist between two energy levels.
True
False
39
Which of the following statements are part of Dalton's atomic theory? Select all that apply.
All elements are composed of atoms.
Compounds contain atoms of more than one element.
All atoms of same element have ame mass
All atoms of different elements have different masses.
In a particular compound, atoms of different elements combine in same way.
40
Which statement about subatomic particles is true?
Unlike protons or neutrons, electrons have no mass.
Neutrons have no charge and no mass.
Protons, neutrons, and electrons all have about the same mass.
An electron has far less mass than either a proton or neutron.
41
Which subatomic particle did Thompson discover?
electron
neutron
proton
42
Scientists predict the locations of electrons in atoms by using ___.
probability
geometry
simple math
algebra
43
Horizontal rows on the Periodic Table are called ___.
periods
groups
orbitals
electron clouds
44
Based on his Gold Foil experiment, Rutherford thought that most of an atom consisted of empty space.
False
True
45
The _______________of an atom is the sum of the protons and neutrons in the nucleus of that atom.
density
atomic number
volume
mass number
46
In a neutral atom, the number of protons is equal to the number of ___.
neutrons
positrons
electrons
isotopes
47
Which statement about subatomic particles is true?
Neutrons have no charge and no mass.
An electron has far less mass than either a proton or neutron.
Unlike protons or neutrons, electrons have no mass.
Protons, neutrons, and electrons all have about the same mass.
48
The mass number of an element is the number of protons + the number of ___.
positrons
electrons
quarks
neutrons
49
Based on Bohr's model, electrons move around nucleus at fixed distance from nucleus based on energy that electron has.
True
False
50
Democritus proposed that 'atomos' are: ___. Select all that apply.
unable to be subdivided
very large
too small to see
51
Identify the four elements as proposed by Aristotle. Select all that apply.
earth
water
air
fire
52
For which element did Mendeleev correctly predict the properties even before it had been discovered?
Br
H
Ga
Xe
53
The majority of the elements on the Periodic Table are nonmetals.
False
True
54
An isotope is an atom with the same number of protons but a different number of ___.
neutrons
electrons
positrons
nucleu
55
Which model of the atom is illustrated in the diagram below?
Electron cloud model
Plum pudding model (Thomson)
Rutherford model
Bohr model
56
The image shows gold foil experiment. What caused some alpha particles to bounce straight back from the gold foil?
electrons in the gold atoms
other alpha particles
negative charges in the gold atoms
nuclei in the gold atoms
57
Carbon is a metalloid.
True
False
58
Which of the following is unique for any given element?
Electron charge
Atomic number
Mass of protons
Number of neutrons
59
Over 99% of the atom's mass is contained outside of the nucleus.
False
True
60
An atom has a mass number of 31 and 16 neutrons in its nucleus. What is the atomic number of the element?
31
17
15
16
