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Unit 4 Review-Atomic Structure Flashcards | StudBud
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Unit 4 Review-Atomic Structure
Unit 4 Review-Atomic Structure
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1
Who provided evidence for the existence of a nucleus in an atom?
Schrodinger
John Dalton
Ernest Rutherford
2
What is the arrangement of electrons in the orbitals of an atom called?
Electron Cloud
Electron Configuration
Electron Paths
3
An electron cloud is the most likely location in which an electron can be found.
False
True
4
According to Bohr, what happened to electrons when the atom absorbed energy?
Electrons moved closer to the nucleus
Electrons moved away from the nucleus
Electrons did not move
5
Aristotle did not believe that matter was composed of tiny, indivisible.....
Elements
Atoms
Clouds
6
What 2 subatomic particles are found in the nucleus of an atom?
Electrons and Neutrons
Protons and Neutrons
Protons and Electrons
7
The most likely location of an electron in is atom is called...
Probability
Nucleus
Electron cloud
8
Atoms of the same element will always have the same number of...
Electrons
Protons
Neutrons
9
An atom in an excited state has less energy and is more stable than an atom in a grounded state.
True
False
10
If an element has 11 protons its _______ is also 11.
Atomic Mass
Atomic Number
Number of Atoms
11
What tells the number of protons in an atom?
Mass Number
Atomic Number
Electron Cloud
12
An atom in which an electron has moved to a high energy from a lower energy level is in what state?
Grounded State
Excited State
13
Subatomic particles have an electron that has far less mass than either a proton or neutron?
False
True
14
An electron has the same amount of energy in all orbitals?
False
True
15
A Carbon-14 atom has 6 protons, that means it will have 8 neutrons.
False
True
16
What scientist thought that matter was made up of tiny particles that could not be divided (indivisible)?
Rutherford
Aristotle
Democritus
17
The glowing of a neon light is cause by electrons emitting energy as they.....
Move from lower to gigher energy levels.
Move from higher to lower energy levels.
Collide with the nucleus.
18
A firework display revels electrons moving from _____ energy levels to ______ energy levels?
Lower to Higher
Higher to Lower
19
What subatomic particle is unique for any given element?
Number of protons
Number of electrons
Number of neturons
20
John Dalton concluded that all atoms of a single _______ have the same mass.
Compound
Mass
Element
21
Whose experiment provided evidence that an atom contains negatively charged particles?
Democratitus
Bohr
J.J. Thomson
22
In Bohr's model of the atom, what moves in fixed orbitals around the nucleus?
Protons
Neutrons
Electrons
23
Democritus coined what word for a tiny piece of matter that cannot be divided?
Element
Compound
Atom
24
Who believed that all matter was made up of four elements-earth, air, fire and water?
Aristotle
Thomson
Rutherford
25
Rutherford's gold foil experiment proved that there's a dense, positively charged mass in the center of the atom.
False
True
26
The glowing of a neon light is caused by electrons emitting energy as they..
Collide with the nucleus
Move from high energy level to lower energy levels
Move from low energy levels to higher energy levels
27
Water that contains hydrogen-2 atoms instead of hydrogen-1 atoms is called....
Atomic Number
Heavy Water
Atomic Mass
28
According to Schrodinger (modern atomic theory), electrons traveled in areas called
Clouds
Pathways
Loci
29
An electron has a negative charge.
True
False
30
Which statement is true about oxygen-17 and oxygen-18.
The have the same mass number
They are isotopes of oxygen
They have unequal numbers of protons and electrons
31
Elements will have the most electron orbitals with those that have few protons.
False
True
32
To find the number of neutrons in an atom you would, you would subtract....
Mass number from Atomic Number
Atomic Number from Mass Number
Number of Protons from Electrons
33
John Dalton's model of the atom consisted of...
A positive-dense nucleus, proving the atom is mostly empty space
A tiny, solid sphere with a predictable mass for a given element
A tiny, solid sphere with an unpredictable mass for a given element
34
Borh's model of the atom had electrons on energy levels that Rutherford's model did not.
False
True
35
Which part of the atom has the least mass?
Electron
Protron
Neutron
36
The number of protons in one atom of an element is that element's.....
Electrical Orbit
Mass Number
Atomic Number
37
J.J. Thomson discovered a subatomic particle with a neutral charge.
False
True
38
What do scientists use to predict the location of electrons in atoms?
Algebra
Scientific Theory
Probability
39
Whose atomic model said that electrons travel around the nucleus in fixed energy levels that vary from level to level?
Dalton
Bohr
Aristotle
