Atomic Structure And Radioactivity
37 Questions
| Total Attempts: 307
Review on the parts of the atom, atomic number, mass number and radioactivity.
Questions and Answers
- 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.
![The number 14 is the: - ProProfs]( "The number 14 is the:")
The number 14 is the:- A.
Mass number
- B.
Atomic number
- C.
Average atomic mass
- 11.
![The 28.09 is the: - ProProfs]( "The 28.09 is the:")
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.Radium-211 has a half-life of 13 seconds. If you started with 600 mg of Ra-211, how many seconds would it take until you only had 18.75 mg?
- 17.The half-life of Radium-229 is 4 minutes. What was the original mass (to the nearest 1/100th of a gram) of Ra-229 if .32 g remains after 12 minutes?
- 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
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