Atomic Structure And Radioactivity
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Review on the parts of the atom, atomic number, mass number and radioactivity.
- 1.This subatomic particle has a negative charge.
- A.
Neutron
- B.
Proton
- C.
Electron
- 2.The total number of these determines the mass number.
- A.
Protons and electrons
- B.
Neutrons and electrons
- C.
Neutrons and protons
- 3.This particle has a mass that is about 1800 times smaller than the other two.
- A.
Electron
- B.
Proton
- C.
Neutron
- 4.Isotopes of the same element have different numbers of these particles.
- A.
Protons
- B.
Neutrons
- C.
Electrons
- 5.The number of these particles determines the atomic number
- A.
Protons
- B.
Protons and neutrons
- C.
Protons and electrons
- D.
Neutrons
- E.
Neutrons and electrons
- 6.Found in the nucleus
- A.
Electrons and neutrons
- B.
Protons, electrons and neutrons
- C.
Protons and neutrons
- D.
Electrons and protons
- 7.Has a positive charge
- A.
Electrons
- B.
Neutrons
- C.
Protons
- 8.Has no charge
- A.
Electrons
- B.
Neutrons
- C.
Protons
- 9.Has a mass of about 1 amu
- A.
Protons
- B.
Electrons
- C.
Neutrons
- D.
Protons and electrons
- E.
Neutrons and electrons
- F.
Protons and neutrons
- 10.
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The number 14 is the:- A.
Mass number
- B.
Atomic number
- C.
Average atomic mass
- 11.
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The 28.09 is the:- A.
Atomic number
- B.
Mass number
- C.
Average atomic mass
- 12.You will need a periodic table for this one:A neutral atom of Pb-208 would have ? protons.
- A.
82
- B.
208
- C.
126
- 13.A neutral atom of Pb-208 would have ? neutrons.
- A.
208
- B.
82
- C.
126
- 14.A neutral atom of Pb-208 would have ? electrons.
- A.
208
- B.
82
- C.
126
- 15.
- 16.
- 17.
- 18.Radium-226 has a half-life of 1600 years. What percentage would be left (to the nearest 1/100th of a percent) after 6400 years? Put a percent sign on your answer!
- 19.In beta decay, a neutron undergoes a change into a ? and then an electron is ejected from the nucleus.
- 20.In both fission and fusion, a small amount of ? is converted into energy.
- 21.In nuclear fusion, atoms of hydrogen are combined under intense heat and pressure to form ?
- 22.In nuclear fission, a ? strikes an atom of uranium (or plutonium) causing it to split.
- 23.Isotopes of the same element have the same mass number but different atomic numbers.
- A.
True
- B.
False
- 24.Over 99% of the mass of an atom is located within the tiny nucleus.
- A.
True
- B.
False
- 25.Most of an atom's volume is empty space.
- A.
True
- B.
False
- 26.The atomic number of an element is found by averaging the mass numbers of the isotopes and also takes into consideration the relative abundance of each isotope.
- A.
True
- B.
False
- 27.The nucleus of an atom has no charge, it is neutral.
- A.
True
- B.
False
- 28.In alpha decay, the nucleus ejects a particle that has two protons and two neutrons.
- A.
True
- B.
False
- 29.In alpha decay, the atomic number decreases by 4 and the mass number decreases by 2.
- A.
True
- B.
False
- 30.
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The radium nucleus here would be called:- A.
An alpha particle
- B.
The daughter nucleus
- C.
The parent nucleus
- 31.
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The helium nucleus here would be called:- A.
An alpha particle
- B.
The daughter nucleus
- C.
The parent nucleus
- 32.Which of the following is the best definition for half-life?
- A.
Half of the time that it takes for the radioactive atoms to decay
- B.
The time it takes for half of the radioactive atoms to decay
- C.
The time it takes for half of a radioactive atom to decay
- D.
Half of the time it takes for half of the radioactive atoms to decay
- 33.
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The very last symbol above represents:- A.
The daughter nucleus
- B.
An alpha particle
- C.
A beta particle
- D.
A neutron
- 34.
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How did the atomic number increase by one?- A.
A neutron changed into a proton
- B.
A proton was captured by the carbon
- C.
An electron was changed into a proton
- D.
A beta particle was captured by the nitrogen
- 35.
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Which answer is closest to the half-life of the parent shown here?- A.
5730 years
- B.
45 seconds
- C.
82 minutes
- D.
1.5 years
- 36.
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This picture most closely shows:- A.
Alpha decay
- B.
Beta decay
- C.
Neutron capture
- D.
Nuclear fission
- E.
Nuclear fusion
- 37.
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The small white circles represent:- A.
Neutrons
- B.
Alpha particles
- C.
Beta particles
- D.
Protons
- E.
Electrons
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