atomic model scientists nuclear chem particlespotpourri 100 200 300 400 500 final

Atomic Atomic ModelModel

ScientistsScientists Nuclear Nuclear ChemChem

ParticlesParticles PotpourriPotpourri

100 100 100 100 100

200 200 200 200 200

300 300 300 300 300

400 400 400 400 400

500 500 500 500 500

Final

100 Atomic ModelAtomic Model

Name the apparatus used to discover the electron

Answer

Atomic ModelAtomic Model 100

Cathode ray tube

200 Atomic ModelAtomic Model

Name the scientist who discovered the electron. Name the atomic model that was a

result of this discovery.

Answer

Atomic ModelAtomic Model 200

J. J. Thomson

Plum Pudding Model

300 Atomic ModelAtomic Model What conclusion can be drawn from

the fact that most of the alpha particles passed straight through the

foil in the Gold Foil Experiment?

Answer

Atomic ModelAtomic Model 300

An atom is mostly empty space.

400 Atomic ModelAtomic Model

What conclusion can be drawn from the fact that a few of the alpha

particles were deflected by (bounced back from) the foil in the Gold Foil

Experiment?

Answer

Atomic ModelAtomic Model 400 Answer

Atoms have a small, dense, positive nucleus.

500 Atomic ModelAtomic Model

Draw and label the Plum Pudding Model.

Answer

Atomic ModelAtomic Model 500 Answer

100 ScientistsScientistsName the scientist who used the

Oil Drop Experiment to determine the charge on an

electron.

Answer

ScientistsScientists100 Answer

Millikan

200 ScientistsScientists

• Describe three of Marie Curie’s unique accomplishments as a scientist.

Answer

Scientists Scientists 200 Answer• Helped discover radioactivity.• Discovered and named two new

elements.• First woman to earn a Nobel Prize.• First person to win 2 Nobels.• Established use of X-Rays in

WWI.

300 ScientistsScientists

Name the discoverer of the neutron.Answer

Scientists Scientists 300

James Chadwick

400 ScientistsScientists

Describe two corrections to Dalton’s 1808 Atomic Theory.

Answer

Scientists Scientists 400 Answer

• Atoms are divisible (they are made of smaller particles)

• Atoms of same element can have different masses (isotopes)

• Atoms can be created and destroyed (nuclear chemistry)

500 ScientistsScientists

Name the scientists credited with the discovery of radioactivity.

Explain how this discovery changed the idea of the “indivisible” atom.

Answer

Scientists Scientists 500 Answer

Henri Becquerel, Marie Curie, Pierre Curie

The fact that something can be emitted from the atom indicated that it must

have subatomic particles.

100 Nuclear ChemNuclear Chem

A 4.00 g sample of Francium-210 decays to a 1.00 g

sample in 5.2 min. What is the t1/2 of this isotope?

Answer

Nuclear ChemNuclear Chem 100 Answer

4.00 g to 2.00 g in one half life

2.00 g decays to 1.00 g in 2nd half life

5.2/2 = 2.6 min= t1/2

200 Nuclear ChemNuclear Chem

• What type of radioactive decay results in energy only being emitted from the nucleus?

Answer

Nuclear ChemNuclear Chem 200

• Gamma decay – emits gamma rays

300 Nuclear ChemNuclear Chem

Write the nuclear chemical equation for the beta decay of

rubidium-90. Answer

Nuclear ChemNuclear Chem 300 Answer

400 Nuclear ChemNuclear Chem

Write the nuclear symbol of the new element produced when

Neptunium-237 (Np) undergoes alpha decay.

Answer

Nuclear ChemNuclear Chem 400 Answer

500 Nuclear ChemNuclear Chem

What scientist discovered the nucleus of the atom and later the

proton?Name and label the new model generated from this discovery.

Answer

Nuclear ChemNuclear Chem 500

Ernest Rutherford Planetary Model

electron in orbit

dense, positive nucleus

empty space

100 Particles Particles

Name the particle that has about the same mass as a proton but no

electric charge.

Answer

ParticlesParticles 100 Answer

Neutron

200 ParticlesParticles

Write the complete nuclear symbol for the particle that has

48 protons64 neutrons46 electrons

Answer

ParticlesParticles 200 Answer

300 ParticlesParticles

Give the number of protons, neutrons and electrons in

potassium-40.

Answer

ParticlesParticles 300 Answer

19 protons

21 neutrons

19 electrons

400 ParticlesParticles

Give the number of protons neutrons and electrons for the most abundant isotope

of B3-

Answer

ParticlesParticles 400

5 protons

6 neutrons

8 electrons

500 ParticlesParticles Name the force which holds together the particles in the

nucleus.Explain why it is strange to us.

Answer

ParticlesParticles 500

Nuclear ForceIt is strange because like charges usually repel, yet many positive charges are

held together in small space.

100 PotpourriFor the Electron Cloud Model, name the scientist credited with its discovery and explain the many tiny dots.Answer

Potpourri 100

Schrodinger

Dots represent probability of locating an electron in a particular region. Where

the dots are densest, an electron is more likely to be found. Where there are

few or no dots, an electron is unlikely.

200 Potpourri

Give two reasons why the Bohr Model is invalid.

Answer

Answers for Potpourri 200

1. It is impossible to predict a specific location and momentum (energy)

for an electron. (Heisenberg Uncertainty Principle)

2. The math does not correspond to data for any atom other than H

(one electron)

300 Potpourri

Name the two main regions of the atom.

Which region occupies most of the volume of the atom?

Which region has most of the atom’s mass?Answer

Potpourri 300

• The two regions are the nucleus and the electron cloud.

• The electron cloud constitutes most of the volume of the atom and is mostly empty space.

• The nucleus contains most of the atom’s mass.

400 Potpourri

A reaction between 46 g of sodium and 71g of chlorine will produce how much salt (NaCl)?

Answer

Potpourri 400 Answer

117 g (Law of Conservation of Mass)

500 Potpourri

Give chemical formulas of two compounds which support the Law

of Multiple Proportions.

Answer

Potpourri 500 Answer

• CO2 and CO

• Also, N2O and N2O4

• (Same elements can combine in different whole

number ratios to form different compounds)

Final Jeopardy

Draw and explain the Indivisible Atom Model.

Who first described this model?

Answer

Final Jeopardy Answer

It is a solid sphere with no smaller parts inside.

First proposed by Democritus (Greeks) 400 BC