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Before we start, make sure each group has a calculator, periodic
table, and a white boardNo notes though
Choose Your CategoryHistory Atoms and the
Periodic TableAtomic Parts
Isotopes Laws Radiation
100 100 100 100 100 100
200 200 200 200 200 200
300 300 300 300 300 300
400 400 400 400 400 400
500 500 500 500 500 500
The Final Question
History - 400
• I used the oil drop experiment to determine the charge/mass of an electron.
Back
The Answer is Millikan.
Atoms and the Periodic Table - 100
• This element has an atomic mass of 1.01?
Back
The Answer is Hydrogen
Atoms and the Periodic Table - 200
• This element has 12 protons in its nucleus?
Back
The Answer is Magnesium.
Atoms and the Periodic Table - 300
• Write the nuclear symbol of the element with 24 protons and 28 neutrons.
Back24
52Cr•The Answer is
Atoms and the Periodic Table - 400
• What is the mass of an element with 25 protons, 25 electrons, and 30 neutrons?
Back
The Answer is 55.
Atoms and the Periodic Table - 500
Back•The Answer is 34, 34, 46
Isotope Number of Protons
Number of Electrons
Number of Neutrons
Selenium - 80
Complete the chart:
Atomic Parts - 400
• I change the atomic mass, but not the atomic number.
Back
The Answer is the neutron.
Atomic Parts - 500
• What subatomic particles have a mass that impacts the mass of the atom?
Back
The Answer is protons and neutrons.
Isotopes - 200
• Calculate the average atomic mass for carbon if its abundance in nature is 79.3% carbon-12, 13.3% carbon-13, and 7.4% carbon-14.
Back
The Answer is 12.3 g/mol
Isotopes - 300
• One isotope of aluminum is aluminum-27. The 27 refers to the ______________ (two words).
Back
The Answer is mass number.
Isotopes - 400
• The ____________________ of an isotope is the time required for half the nuclei in a sample of the isotope to undergo radioactive decay.
Back
The Answer is half-life
Isotopes - 500
• What is the half-life of an isotope if 150 g of a 600 g sample of the isotope remains after 2.0 years?
Back
•The Answer is 1.0 years.
Laws - 100
• The law that states that mass cannot be created or destroyed in ordinary chemical and physical changes.
Back
The Answer is Law of Conservation of Mass
Laws - 200
• The law that states that a chemical compound always contains the same elements in exactly the same proportions by weight or mass.
Back
The Answer is Law of Definite Proportions
Laws - 300
• During a chemical reaction, a group combines 5.00 grams of sodium and 7.72 grams of chlorine. The result of the reaction was 12.72 grams of sodium chloride. Which law does this support?
Back
The Answer is Law of Conservation of Mass
Laws - 400
• The law that states that when two elements combine to form two or more compounds, the mass of one element that combines with a given mass of the other is in ratio of small whole number.
Back
The Answer is Law of Multiple Proportions
Laws - 500
• Every molecule of octane, an important component is gas, has eight carbon atoms and eighteen hydrogen atoms. Which law does this support?
Back
The Answer is Law of Definite Proportions
Radiation - 200
+ 2
This formula shows the
___________________ of matter
e1
0
e1
0
The Answer is annihilationBack
Radiation - 400
• Curium-246 combines with carbon-12 to form nobelium-254 and four neutrons. Is this fusion or fission?
Back
The Answer is fusion
Radiation - 500
• Fill in the blank, identify the radioactive particle, and tell whether that particle was emitted or captured.
eAt1
0_____
85
222
Back
The Answer is beta emissionRn86
222
The Final Question
• The final question has to deal with:
»Percent Composition
Make your wager and hand it to the teacher
Average Mass
• Carbon, hydrogen, and oxygen combine to make C2H6O2. What percent by mass do you have of each element?