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WorksheetsChem Unit 2 Review
Total questions: 43
Worksheet time: 50mins
_____is the joining of atomic nuclei
Fusion
chain reaction
Photosynthesis
Fission
_______is the splitting of atomic nuclei
Fission
nuclear reaction
Fusion
bayler reaction
Which reaction represents fusion?
Which reaction represents fission?
The mass numbers of the product is greater than the mass numbers of the original nucleus
The mass numbers of the product is less than that of the original nucleus
The mass numbers of the product is the same as the mass numbers of the original nucleus
The mass numbers of the product is 100 times greater than the original nucleus
Which type of nuclear process is shown by the model in the figure?
fission
fusion
What is the mass number of this atom?
1
3
4
7
How many protons and neutrons are in an 18Oxygen isotope?
8 protons
8 neutrons
10 protons
8 neutrons
8 protons
10 neutrons
18 protons
18 neutrons
What is the Half life of this isotope?
5 seconds
10 seconds
15 seconds
20 seconds
What is the Half Life of this isotope?
3 days
5 days
8 days
10 days
Why did Ernest Rutherford and his colleagues perform the Gold-Foil Experiment?
They wanted to test and confirm the Plum-Pudding model
They wanted to test John Dalton's Model
They were looking for electrons
They wanted to come up with their own Atomic Model
What is the name of J.J. Thomson's Model of an Atom?
Jimmy Neutron Model
Solar System Model
Plum-Pudding Model
Quantum mechanical Model
Who was the first person to "think" of an atom?
Democritus
J.J. Thompson
Rutherford
Bohr
Radioactive isotopes undergo nuclear decay for this reason.
to make new elements
to produce energy
to combine chemically
to become stable
Which form of radiation is the lowest energy, composed of a helium nucleus and being stopped by a piece of paper?
alpha
beta
gamma
neutrino
What does Z represent?
Atomic Mass (protons + neutrons)
Atomic Number (protons)
Charge (protons - electrons)
Element Symbol
What does X represent?
Atomic Mass (protons + neutrons)
Atomic Number (protons)
Charge (protons - electrons)
Element Symbol
What does A represent?
Atomic Mass (protons + neutrons)
Atomic Number (protons)
Charge (protons - electrons)
Element Symbol
Where are the nonmetals located on the Periodic Table?
On the right
On the left
On the stairstep
Where are the metalloids located on the Periodic Table?
On the right
On the left
On the stairsteps
Where are the metals located on the Periodic Table?
On the right
On the left
On the stairsteps
What is the average mass of this element?
Compute the average atomic mass for this element.
27.977 amu
28.09 amu
28.976 amu
An element exists as the three isotopes shown. What is the average atomic mass?
20.74 amu
22.56 amu
18.39 amu
24.31 amu
what part of the atom tells you what element it is?
Protons
nuetrons
electrons
electron cloud
How do you find how many nuetrons are in an atom?
subtract the atomic number by the atomic mass
its the same as the protons
its the atomic mass
add the atomic number and the atomic mass
In an endothermic reaction, heat is ...
absorbed
released
absorbed
released
What type of reaction is this?
Exothermic
Endothermic
Energy Producing
No way to tell
The graph shows a reaction profile for the reaction between methane and oxygen. What does X represent?
Activation energy
Overall energy
Reactants
Progress of the reaction
How many moles of carbon atoms are there in 5.0g of carbon?
An element's molar mass can be found on what part of an element's entry on the periodic table?
atomic number
atomic mass
group number
it can't be found on the periodic table
Which of the following dimensional analysis setups will correctly convert 27.76 g of Li to atoms of Li?
A
B
C
D
