| Atomic History | Electrons | Nuclear Chem | Atomic Structure | Radioactive Decay |
| 10 | 10 | 10 | 10 | 10 |
| 20 | 20 | 20 | 20 | 20 |
| 30 | 30 | 30 | 30 | 30 |
| 40 | 40 | 40 | 40 | 40 |
| 50 | 50 | 50 | 50 | 50 |
| Final Question | ||||
Who was the first scientist to show that atoms emit any negative particles.
Who was the first scientist to show that atoms emit any negative particles.
Thomson
Which of Dalton's statements in his atomic theory is no longer true?
Which of Dalton's statements in his atomic theory is no longer true?
All atoms of a given element are identical.
Which scientists alpha-particle scattering experiment led him to conclude that the nucleus of an atom contains a dense center of positive charge?
Which scientists alpha-particle scattering experiment led him to conclude that the nucleus of an atom contains a dense center of positive charge?
Rutherford
Who discovered the neutron
Who discovered the neutron
Chadwick
Responsible for the cloud model of atoms.
Responsible for the cloud model of atoms.
Schrodinger
Which transition occurs when light with a wavelength of 434 nm is emitted by a hydrogen atom?
Which transition occurs when light with a wavelength of 434 nm is emitted by a hydrogen atom?
5 ----> 2
Electrons must fill lowest energy levels first.
Electrons must fill lowest energy levels first.
Aufbau's Principle
In Bohr's atomic theory, when an electron moves from one energy level to another energy level more distant from the nucleus, what happens to energy
In Bohr's atomic theory, when an electron moves from one energy level to another energy level more distant from the nucleus, what happens to energy
Energy is absorbed
A light with a short wavelength has what type of frequency?
A light with a short wavelength has what type of frequency?
increased
Outer shell electrons
Outer shell electrons
Valence electrons
The combining of two light nuclei to form a heavier nucleus.
The combining of two light nuclei to form a heavier nucleus.
fusion
If Pu-239 goes through an alpha decay, what is the new isotope?
If Pu-239 goes through an alpha decay, what is the new isotope?
U-235
Which radioactive process emits the product with the greatest penetrating power?
Which radioactive process emits the product with the greatest penetrating power?
gamma
Describe a beta particle and what happens to an isotope that goes through a beta decay.
Describe a beta particle and what happens to an isotope that goes through a beta decay.
it is an electron. The new isotope increases by 1 in the atomic number.
The half-life of thorium-227 is 18.2 days. How many days are required for 75% of a given amount to decay?
The half-life of thorium-227 is 18.2 days. How many days are required for 75% of a given amount to decay?
37.44 days
List the 3 subatomic particles and give their respective charges and masses.
List the 3 subatomic particles and give their respective charges and masses.
proton, positive chg, 1 amu; neutron, no charge, 1 amu; electron, negative charge, 1/2000 amu
Explain the difference between C12 and C14 including their numbers of protons and Neutrons.
Explain the difference between C12 and C14 including their numbers of protons and Neutrons.
C-12 6 protons & 6 neutrons; C-14 6 protons & 8 neutrons
Give the electron configuration for Cobalt
Give the electron configuration for Cobalt
1s2 2s2 2p6 3s2 3p6 4s2 3d7
What is the result of an electron moving from n=4 to n=1?
What is the result of an electron moving from n=4 to n=1?
UV light is emitted at 97 nm
How many electrons are in the outermost energy level of an electrically neutral atom of aluminum?
How many electrons are in the outermost energy level of an electrically neutral atom of aluminum?
3
Describe the penetrating power of a gamma ray.
Describe the penetrating power of a gamma ray.
Can be slowed by concrete or Pb
41. What is the half-life of a radioactive isotope if a 500.0 g sample decays to 31.25 g in 24.3 hours?32.4 hrs.
41. What is the half-life of a radioactive isotope if a 500.0 g sample decays to 31.25 g in 24.3 hours?32.4 hrs.
8.1 hours
42. An object has a mass of 2.63 g and a volume of 2.25 mL. What is its density, and will it sink or float in water?
42. An object has a mass of 2.63 g and a volume of 2.25 mL. What is its density, and will it sink or float in water?
1.17 g/mL; sink
40. A 3.60 g sample of a radioactive material has decayed to 0.45 g over the course of 6.75 hours. What is the half-life of this material?
40. A 3.60 g sample of a radioactive material has decayed to 0.45 g over the course of 6.75 hours. What is the half-life of this material?
2.25 hours
The process of splitting one heavy nucleus into two nuclei with smaller mass numbers.
The process of splitting one heavy nucleus into two nuclei with smaller mass numbers.
Fission
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