Review Game

 What particle defines an element?

 Proton

 What charge do electrons have?

 (-) negative

 What charge do protons have?

 (+) positive

 What charge do neutrons have?

 0 neutral

 What particles are in the nucleus?

 protons and neutrons

 Who discovered the nucleus?

 Rutherford

 Who discovered the electron?

 Thomson

 What apparatus was used to discover the electron?

 Cathode Ray Tube

 What was the famous experiment called that led to the discovery of the nucleus?

 Gold Foil Experiment

 What was Thomson’s atomic model nicknamed?

 Chocolate-Chip-Cookie Dough Model or Plum Pudding Model

 Who is considered to be the scientist with the first atomic theory?

 Dalton

 What was the model called that shows electrons in specific paths around the nucleus?

 Planetary Model

 What is the modern theory of the atom called?

 Electron Cloud Theory or Quantum Mechanical Model

 What was Dalton’s atomic model nicknamed?

 Billiard Ball Model

 What law describes the fact that hydrogen and oxygen can form both water (H 2 O) and hydrogen peroxide (H 2 O 2 )?

 Law of Multiple Proportions

 What law describes the fact that for the substance carbon dioxide, the ratio of carbon to oxygen is always 1:2?

 Law of Definite Proportions

 What two parts to Dalton’s atomic theory have been proven to be incorrect?

 The atom is indivisible and that all atoms of a particular element are identical

 What particle represents the atomic number?

 proton

 What region of the atom is the combined mass of the protons and neutrons?

 nucleus

 What is the electron configuration of Nitrogen?

 1s 2 2s 2 2p 3 ↑↓ ↑↓ ↑ ↑ ↑

 How many electrons will an atom of phosphorus have if its charge is negative 3?

 18 e-

 What is the mass number of a silver atom with 47 protons, 62 neutrons and 46 electrons?

 109

 Write the nuclear symbol of an atom that has 53 protons, 75 neutrons and 54 electrons.

 128 I -1 53

 What element has the electron configuration 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3d 4 ?

 Chromium

 In Uranium-240, what does the number 240 represent?

 Mass number

 What is the average atomic mass for the element chlorine with: 98.89% 12 C and 1.11% 13 C?

 amu

 What is the average atomic mass of chlorine with 75.53% 35 Cl and 24.47% 37 Cl?

 amu

 What element is represented by the following data? Mass numbers 28, 29, and 30 and relative abundances of 92.21%, 4.70% and 3.09% respectively?

 amu, Silicon

 How many electrons are possible in the third energy level?

 18

 How many electrons are possible in the 1 st energy level?

22

 How many electrons are possible in the 2 nd energy level?

88

 What rule states that electrons must enter orbitals of lowest energy first?

 Aufbau Principle

 How many orbitals are there in an “f” sublevel?

77

 What rule states that electrons can enter orbitals of equal energy one at a time with spins parallel until all have one electron, and then the second electrons can enter the orbital with the opposite spin?

 Hund’s Rule

 What rule states that each orbital can only hold two electrons each with an opposite spin?

 Pauli-Exclusion Principle

 What is the difference between the mass number and the atomic mass of an element?

 Mass # = Protons + Neutrons, and atomic mass is the weighted average of all the naturally occurring isotopes of that element

 What is the probability of finding an electron in the electron cloud at a given time?

 90%

 If the electron is not in the electron cloud at a given time, where is it?

 outside the electron cloud

 What are the two things that are impossible to know at the same time about an electron?

 speed and position

 Given the following Isotopic/Nuclear symbol, how many protons, neutrons and electrons are in the following? 27 Al 3+ 13

 13, 14, 10

 Given the following Isotopic/Nuclear symbol, How many protons, neutrons and electrons are in the following? 79 Se 2- 34

 34, 45, 36

 Write the electron configuration for Lutetium.

1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 ↑↓ ↑↓ ↑↓ ↑↓ ↑↓ 3d 10 4p 6 5s 2 ↑↓ ↑↓ ↑↓ ↑↓ ↑↓ ↑↓ ↑↓ ↑↓ ↑↓ 4d 10 5p 6 6s 2 ↑↓ ↑↓ ↑↓ ↑↓ ↑↓ ↑↓ ↑↓ ↑↓ ↑↓ 4f 14 5d 1 ↑↓ ↑↓ ↑↓ ↑↓ ↑↓ ↑↓ ↑↓ ↑ __ __ __ __

 Draw the diagonal rule

 How many valence electrons does phosporus have?

55

 Draw the Lewis Dot Diagram (Electron Dot diagram) for Phosporus

 Write the abbreviated(shorthand) electron configuration of Gold.

 Gold- Au (79 electrons)  [Xe]6s 2 4f 14 5d 9

 What is a Beta Particle?

0 e

 What is an alpha particle?

4 He 2

 Write the equation for the alpha decay of Uranium-235.

U → He + Th

 The half-life of Potassium-42 is 12.4 hours. How much of a 750 g sample is left after 62 hours?

 23.4 g