Atomic Structure Exam Review

Who discovered the nucleus?

• Ernest Rutherford

• JJ Thomson

• James Chadwick

• Mr. Alleyn

What did the gold foil experiment help to explain?

• Atoms have neutrons in the nucleus

• Atoms are made of mostly positively charged material with negatively charged electrons embedded inside

• atoms have electrons in probability clouds

• atoms have a nucleus with most of the mass at the center

Who used the cathode ray tube to discover negatively charged electrons?

• Rutherford

• Einstein

• Thomson

• Milikan

What discovery did JJ Thomson make that proved that the atom is not indivisible?

• Proton

• Electron

• Atomic Nucleus

• Neutrons

During the gold foil experiment why didn't all the alpha particles go straight through the gold?

• Some alpha particles hit electrons

• Some alpha particles hit other alpha particles

• Some alpha particles hit the relatively massive nucleus

• Some alpha particles hit the electron cloud

What is the present model of the atom?

• Bohr Model

• Probability Model

• Uncertainty Model

• Quantum-Mechanical Model

Which of the following statements correctly describes the quantum mechanical model?

• Electrons occupy circular orbits with quantized energy levels

• Electrons occupy regions of space whose shape is determined by complex mathematical equations

• Estimates the probability of finding an electron in a certain postion

• Both B and C

How are the Bohr Model and the Quantum Mechanical Model different?

• The Bohr model has electrons in circular orbits, the quantum mechanical model has them in probability clouds

• The Quantum mechanical model has electrons in circular orbits, the Bohr model has them in probability clouds

The average atomic mass of Chlorine is 35.45. There are two main isotopes of chlorine, chlorine-35, and chlorine-37. Based on that information which of the following statements is correct?

• There are equal amount of Chlorine-35 and Chlorine-37

• There is more Chlorine-35 than Chlorine-37

• There is more Chlorine-37 than Chlorine-35

• There is almost no chlorine-35

Which of the following has a full outermost s and p orbital?

• Period 7

• Group 8A (AKA group 18, AKA noble Gases)

• Inner transition Metals

• Periods 4,5, and 6