Atomic Structure And Radioactivity

37 Questions | By Shuling | Updated: Mar 21, 2022 | Attempts: 480

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Atomic Structure And Radioactivity - Quiz

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:
- A.
  
  Mass number
- B.
  
  Atomic number
- C.
  
  Average atomic mass
11.

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.

Chlorine has two naturally occurring isotopes, Cl-35 with a relative abundance of 75.77% and Cl-37 with a relative abundance of 24.23%. On a piece of paper, work out the average atomic mass of chlorine rounded to the nearest 1/100th of an amu. Check out the explanation if you get it wrong!
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