Chemistry Semester 1 Jeopardy Development of the Atomic Model Structure of the Atom The Periodic Table and Periodic Trends Ionic Charges and Balancing Chemical Formulas Moles, Molar Mass, and Molarity

Democritus Which Greek scientist/philosopher came up with the idea of matter being made of “indivisible blocks” (“atomos” in Greek)

1,2 Who discovered the nucleus? Rutherford

1,3 JJ Thomson came up with the _______ ______ model of the atom. Plum pudding

1,4 What was Bohr’s contribution to the atomic model? Electrons can only orbit at certain energy levels (quantized the atom)

Put these scientists in the correct order of their discoveries (earliest to latest) Chadwick Thomson Heisenberg Rutherford Thomson, Rutherford, Heisenberg, Chadwick

1,4 Which subatomic particle has no charge? neutron

2,1 What is the mass of a proton (including unit)? 1 amu.

2,2 What is the mass of an electron, including unit? 1/2000 amu

2,3 What do you call the probability distribution of where an electron might be located? The electron cloud

2,4 Which scientist’s discovery led to the idea of the electron cloud? Heisenberg

1,4 The number of protons is also called the ______ _______ Atomic number

3,1 How do you figure out the number of neutrons in an atom? Mass # - atomic # = # neutrons

3,2 What decreases as you move from left to right on the periodic table? Atomic radius

3,3 What is ionization energy? The amount of energy it takes to remove an electron from an atom

because that is the AVERAGE atomic mass of all the different isotopes of that element. Why are the atomic masses on the periodic table always have lots of decimal places?

What is the common charge on lithium? +1

4,1 Why doesn’t argon form ionic bonds with anything? It already has 8 valence electrons

4,2 What is the formula for magnesium phosphide? Mg 3 P 2

4,3 What is the formula for potassium hydrogen phosphate?. K 2 HPO 4

How many valence electrons does helium have? 2 (because it only has 2 electrons total, so it’s an exception to the Octet Rule)

1, x is also called ______________________ Avogadro’s Number

5,1 What does the term “molar mass” mean? Its how many grams a mole of that substance weighs.

What is the equation for molarity? Molarity = moles of the substance Liters

5,3 Without using a calculator, which solution has a higher concentration of sugar particles? 50 grams of sugar dissolved into 100 mL of water or 500 grams of sugar dissolved into 10 liters of water? 50 grams into 100 mL

If you had a 1.0 M solution of salt water and you needed to increase the molarity to 2.0, what are the TWO ways you could do it? Add more salt Or Boil away some of the water