atomic concepts.....

 

 

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aim 1.....how did the modem model of the atom evolved over time? quiz

aim 2.....what is the structure of the atom? quiz

aim 3.....what is the wave-mechanical model? quiz

aim 4.....what are the valence electrons? quiz

aim 5.....what are isotopes? quiz

honors

 

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cross-word puzzle

skills students should be able to do

real-world connections


skills students should be able to do

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real-world connections

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Words: atom, average, chemical, electron, emitted, energy, excited, identify, isotopes, mass, modern, neutron, number, opposite, orbitals, positively, subatomic, valence, wave- mechanical

 

The _______ model of the atom has evolved over a long period of time through the work of many scientists. Each _____ has a nucleus, with an overall positive charge, surrounded by one or more negatively charged electrons. __________ particles contained in the nucleus include protons and neutrons. The proton is _________ charged, and the neutron has no charge. The _________ is negatively charged. Protons and electrons have equal but _________ charges. The _________ of protons equals the number of electrons in an atom. The _____ of each proton and each neutron is approximately equal to one atomic mass unit. An electron is much less massive than a proton or a _________. In the _________________ model (electron cloud model), the electrons are in ________, which are defined as the regions of the most probable electron location (ground state). Each electron in an atom has its own distinct amount of _______.  When an electron, in an atom, gains a specific amount of energy, the electron is at a higher energy state (_______ state). When an electron returns from a higher energy state to a lower energy state, a specific amount of energy is _______. This emitted energy can be used to _________ an element. The outermost electrons in an atom are called the _________ electrons. In general, the number of valence electrons affects the __________ properties of an element. Atoms of an element that contain the same number of protons but a different number of neutrons are called ________ of that element. The average atomic mass of an element is the weighted _________ of the masses of its naturally occurring isotopes.

 

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quiz 1

 

Question #1
The modern model of the atom has evolved
[A] over a long period of time through the work of one scientist.
[B] over a long period of time through the work of many scientists.
[C] over a short period of time through the work of one scientist.
[D] over a short period of time through the work of many scientists.

Question #2
What is the charge of any nucleus?
[A] positive
[B] negative
[C] neutral
[D] all of thee above
 

Question #3
Which answer is different from the others?
[A] Proton
[B] Neutron
[C] Nucleus
[D] Electron

Question #4

The cathode ray tube helped to construct which model of the atom?
[A] Hard Sphere Model
[B] Plum-Pudding Model
[C] Planetary Model
[D] Wave-Mechanical Model

Question #5
What is another name for the gold-foil experiment?
[A] Cathode ray experiment
[B] Alpha-particle experiment
[C] Beta-particle experiment
[D] all of the above

Question #6
Which choice has the model of the atom in correct chronological order?
[A] Plum-Pudding Model; Hard Sphere Model; Planetary Model; Wave-Mechanical Model
[B] Hard Sphere Model; Plum-Pudding Model; Planetary Model; Wave-Mechanical Model
[C] Hard Sphere Model; Plum-Pudding Model; Wave-Mechanical Model; Planetary Model
[D] Hard Sphere Model; Planetary Model; Plum-Pudding Model; Wave-Mechanical Model

Question #7
Where is most of the mass of an atom located?
[A] Around the nucleus
[B] In the nucleus
[C] In the electrons
[D] Over the nucleus

Question #8
The mass of an electron is considered negligible.
True
False

Question #9
Which of the following are in the nucleus of an atom?
[A] electrons and neutrons
[B] protons and neutrons
[C] protons and electrons

Question #10
Alpha particles are negatively charged.
True
False


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quiz 2 

 

Question #1
Some atoms have a nucleus with overall neutral charge.
True
False

Question #2
Which of the following statements is incorrect?
[A] A nucleus exists in every atom.
[B] A nucleus contains positive charges only.
[C] A nucleus contains protons and electrons.
[D] The mass of a nucleus is equal to the atomic mass.

Question #3
Neutral atoms become ions when they lose or gain electrons.
True
False

Question #4
How many electrons are in H+?
[A] 0
[B] 1
[C] 2
[D] 3

Question #5
A proton has a mass of 1 amu and a charge of +1.
True
False

Question #6
Which subatomic particle surrounds the nucleus and has 0 amu?
[A] Protons
[B] Neutrons
[C] Electrons

Question #7
How many electrons are present in C-12?
[A] 1
[B] 6
[C] 12
[D] 24

Question #8
An atom of beryllium consists of 4 protons, 5 neutrons, and 4 electrons. The mass number of this atom is
[A] 8
[B] 4
[C] 16
[D] 9

Question #9
When an atom becomes a negative ion, the atom
[A] gains proton.
[B] gains electron.
[C] loses proton.
[D] loses electron.

Question #10
As an atom becomes an ion, its mass number.
[A] decreases
[B] increases
[C] remains the same

 

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quiz 3 

 

Question #1
in the wave-mechanical model (electron cloud model), the electrons are in orbitals.
True
False

Question #2
How many electrons can fit in energy level 2?
[A] 2
[B] 4
[C] 6
[D] 8

Question #3
In the wave-mechanical model, which state is the most probable electron location?
[A] excited state
[B] ground state
[C] mechanical state
[D] electron state

Question #4
What is the electron configuration of an argon in the ground state?
[A] 2-8-7-1
[B] 1-9-7-1
[C] 2-8-8
[D] 2-7-8-1

Question #5
Each electron in an atom has its own distinct amount of energy.
True
False

Question #6
Electrons in the first energy level have the highest potential energy since they are located closest to the nucleus.
True
False

Question #7
What is the possible electron configuration of a neon atom in the excited state?
[A] 2-8
[B] 2-7-1
[C] 2-7-2
[D] 2-6-1

Question #8
When an electron in an atom gains a specific amount of energy, the electron is at a (an)
[A] excited energy state.
[B] ground energy state.
[C] higher energy state.
[D] lower energy state.

Question #9
When an electron move from a lower energy state to a higher energy state, a specific amount of energy is emitted.
True
False

Question #10
Bright line spectra are used to identify elements.
True
False

 

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quiz 4 

 

Question #1
How many valence electrons does an atom of sulfur have?
[A] 3
[B] 6
[C] 7
[D] 9

Question #2
An electron dot (Lewis) structure of an atom of neon will have how many dots?
[A] 2
[B] 4
[C] 6
[D] 8

Question #3
Elements in group number 16 on the periodic table of elements have how many valence electrons?
[A] 1
[B] 3
[C] 6
[D] 8

Question #4
An atom of barium has 4 valence electrons.
True
False

Question #5
Which set of symbols represents atoms with valence electrons in the same energy level?
[A] C, B, O
[B] Ne, Br, Co
[C] B, Ga, In
[D] Al, Ar, Xe

Question #6
In the ground state, how many valence electrons does an atom of Boron have?
[A] 1
[B] 2
[C] 3
[D] 4

Question #7
How many valence electrons are in Mg2+?
[A] 2
[B] 4
[C] 6
[D] 8

Question #8
In which shell are the valence electrons of the elements in period 4 found?
[A] 8
[B] 4
[C] 6
[D] 2

Question #9
An atom of hydrogen has 1 valence electron.
True
False

Question #10
Does the number of valence electrons affect the chemical properties of an element?
True
False

 

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quiz 5 

 

Question #1
Atoms of an element that contain a different number of protons but the same number of neutrons are called isotopes of that element.
True
False

Question #2
The average atomic mass of an element is the weighted average of the masses of its naturally occurring isotopes.
True
False

Question #3
Atoms of the same element that have the same number of protons but different number of neutrons are classified as
[A] isomers.
[B] charged atoms.
[C] isotopes.
[D] charged nuclei.

Question #4
What is the number of protons in the nucleus of an atom of Titanium-51?
[A] 19
[B] 20
[C] 21
[D] 22

Question #5
An atom of boron-10 and an atom of boron-11 differ in
[A] nuclear charge and protons.
[B] mass number and neutrons.
[C] number of electrons and protons.
[D] atomic number and protons.

Question #6
Which of the following isotopes of magnesium is the most abundant in nature?
[A] Magnesium-23
[B] Magnesium-24
[C] Magnesium-25
[D] Magnesium-26

Question #7
Isotopes of an element have to have different
[A] number of electrons.
[B] atomic numbers.
[C] mass numbers.
[D] number of protons.

Question #8
Carbon has 2 isotopes with mass numbers of 12 and 14 and has an average atomic mass of 12.0111. This information indicates that
[A] equal number of each isotope are present.
[B] more isotopes have an atomic mass of 12 than 14.
[C] more isotopes have an atomic mass of 14 than 12.
[D] isotopes have only an atomic mass of 12.

Question #9
The average atomic mass of Ne is 20.179 amu and it is calculated from Ne-20 and Ne-21. Therefore,Ne-20 is the most abundant isotope for neon since 20 amu is the closest value to 20.179.
True
False

Question #10
Copper has two natural isotopes, Cu-63 and Cu-65. Which isotope is the most abundant in nature?
[A] Cu-65
[B] Cu-63
[C] None of them

 

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