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Atomic Theory Unit Exam
Atomic Theory Unit Exam
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Students are being assessed on all formats of atomic theory from histroy to current knowledge.
Flashcards
25 cards
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Questions
25
Answers
1
What is the total number of electrons in the third principal energy level of a sodium atom?
11
7
5
13
2
It is impossible to determine the exact location of an electron only a probable location.
True
False
3
Has only two possible values +1/2 ,−1/2 which indicate states of an electron in an orbital
Angular momentum quantum number
Spin quantum number
Magnetic quantum number
Principal quantum number
4
This rule tells us that; •An atomic orbital can hold a maximum of two electrons.
Heisenberg's Uncertainty Principle
Dalton's Atomic Theory
Pauli's Exclusion Principle
Schrodinger's Cat
5
The electron configuration, [Ar] 4s
1
, is the ground state electron configuration of ________?
Phosphorous
Sodium
Potassium
Krypton
6
This Danish scientist stated that electrons had different energy levels around the nucleus.
Ernst Rutherford
Neils Bohr
Erwin Schrodinger
James Chadwick
7
All of the following are metalloids Except ______
Arsenic
Silicon
Astatine
Antimony
8
Which has greater atomic radii, O, Al, Cd or Se?
Se
O
Cd
Al
9
The electron configuration of an atom is 1s
2
2s
2
2p
4
. The atomic number of this atom is _______?
4
8
10
2
10
•When heated, atoms always emits spectral lines as the electromagnetic "barcode”. What machine?
Spectrophotometer
Compound microscope
EEG
Electron microscope
11
Created the wave equation that we use today to determine where an electron is to be located
Neils Bohr
Louis de Broglie
JJ Thomson
John Dalton
12
Which has greater electronegativity, O, Ga, Po, or Se?
Ga
Po
O
Se
13
Different wavelengths carry different energy; ________ light has less energy than ______ light?
Orange, Red
Green, Yellow
Red, Blue
Black, White
14
To which period does the element belong? 4s
2
3d
10
4p4.__________________
3
2
7
4
15
Identify the element; the only metal in Group 15
Zinc
Antimony
Bismuth
Phosphorous
16
What is happening to the red dot in the image between the two lithium ions?
Excited state
Absorbing photon
Ground state
Emitting photon
17
What type of orbital is this?
f
s
p
d
18
The lowest possible energy level for an electron is known as _______
Excited State
Basement State
Low State
Ground State
19
Mendeleev noticed that certain elements at regular intervals arranged in order of increasing
atomic number
atomic mass
reactivity
density
20
Light waves(UV) have a higher wavelength than sound waves(Radio)?
True
False
21
The maximum number of electrons that are found in the 4s orbital?
4
2
8
10
22
Which is incorrect for the element; [Kr] 5s2 4d10 5p2
group 14
block p
Selenium
period 5
23
Which orbital has a higher electron energy level?
5d
6s
4f
5p
24
Which has the greater ionization energy, As or Cl?
As
Cl
25
Elements that behave similarly and have the same number of valence electrons are found in ____?
Period
Series
Group
Gang
