L1: Isotopes and Introduction to Radioactive Decay-Practice Quiz

What is the charge of an electron and where is it located?

• Electron has a negative (-) charge and is located outside the nucleus in distinct energy levels.

• Electron has a positive (+) charge and is located inside the nucleus.

• Electron has no charge and is located in the nucleus.

• Electron has a negative (-) charge and is located inside the nucleus.

What is the charge of a proton and where is it located?

• Proton has a positive (+) charge and is located inside the nucleus.

• Proton has a negative (-) charge and is located outside the nucleus.

• Proton has no charge and is located inside the nucleus.

• Proton has a positive (+) charge and is located outside the nucleus.

What is the charge of a neutron and where is it located?

• Neutron has no charge and is located inside the nucleus.

• Neutron has a positive charge and is located outside the nucleus.

• Neutron has a negative charge and is located inside the nucleus.

• Neutron has no charge and is located outside the nucleus.

Atoms of the same _____ (same _____ same protons).

• type, same

• element, number

• molecule, electrons

• compound, neutrons

Different number of _____ neutrons.

• Different number of neutrons.

• Same number of neutrons.

• Different number of protons.

• Same number of protons.

Specific types of chemical reactions that happen that cause a change in the _____ nucleus.

• nucleus.

• electron.

• molecule.

• atom.

What is radioactive decay? When an atom is radioactive the ___nucleus___ breaks down. It gives off ___particles___. Because the nucleus is ___unstable___.

• radioactive decay is the process by which an unstable atomic nucleus loses energy by emitting radiation.

• radioactive decay is the process by which a stable atomic nucleus gains energy by absorbing radiation.

• radioactive decay is the process by which an unstable atomic nucleus gains energy by emitting particles.

• radioactive decay is the process by which a stable atomic nucleus loses energy by emitting particles.

What is alpha decay?

• When an atom undergoes alpha decay, it releases an alpha particle. An alpha particle has the same composition as a helium atom (2 protons and 2 neutrons). Alpha particles are heavy and move slowly. Therefore, it is a low energy particle. Alpha particles can be blocked by a sheet of paper.

• Alpha decay is the process where an atom releases a beta particle, which is a high-energy, high-speed electron or positron.

• Alpha decay involves the release of gamma radiation, which is a form of electromagnetic radiation.

• Alpha decay is a type of nuclear fission where the nucleus splits into two smaller nuclei.

What is beta decay?

• beta decay

• alpha decay

• gamma decay

• neutron emission

What is gamma decay?

• Gamma rays are ultra-high energy light particles. Called photons. Gamma radiation is almost always released when alpha & beta decay happen. Gamma radiation is the energy that is released when an unstable atom’s nucleus decays.

• Gamma decay is the process where an atom emits a neutron.

• Gamma decay involves the conversion of a proton into a neutron.

• Gamma decay results in the emission of electrons from the nucleus.