Show:
Sig Figs
Atomic Models
Periodic Trends and Lewis Structures
Naming with Writing and Balancing Equations
Potpourri
100
The number 202 has this many sig figs
What is three
100
What ancient greek philosopher first coined the phrase "atoms"?
Who is Democritus
100
As you move down the periodic table and to the left, this is what happens to the atomic size of atoms.
What is increase
100
The formula for sodium chloride
What is NaCl
100
This term describes an atom with a different number of neutrons
What is an isotope
200
The number 100
What is one
200
What scientist discovered the existence of the nucleus via the "gold foil" experiment?
Who is Rutherford
200
Draw the Lewis structure for water
What is the lewis structure for water
200
The name for the formula: CH4
What is carbon tetrahydride
200
Why is NaCl a compound but H2 is considered an element?
Compounds are made of two or more types of atoms. Elements are made of one type.
300
The number 1.40 x 10^21 has this many sig figs
What is three
300
This scientist discovered the existence of the electron using the cathode ray tube. He also named his model the "Plum Pudding" model of the atom.
Who is JJ Thompson
300
As you move towards Fluorine (up the periodic table and to the right), this is the trend for electronegativity.
What is increase
300
The formula for sodium phosphate
What is Na3PO4
300
These are the four signs of chemical change
What are: 1. Energy Transfer, 2. Color Change, 3. Bubble Formation, 4. Preciptate
400
Adding 4.25 and 1.2890 will give you this answer rounded to the correct # of sig figs
What is 5.54
400
How many protons, neutrons and electrons are in Cs - 133?
What are 78 N, 55 p and 55 e
400
This term refers to an atom's ability to attract electrons.
What is electronegativity
400
The correctly balanced equation for: O2 + H2 --> H2O
What is O2 + 2H2 --> 2H2O
400
Is milk an example of a homogeneous or heterogeneous mixture? Explain WHY.
What is homogeneous because it is the same throughout.
500
Multiplying 0.02987 and 0.785743 will give you what answer to the correct number of sig figs?
What is 0.02347
500
This subatomic particle gives an atom its identity
What is the proton
500
This term refers to the energy required to remove a valence electron.
What is ionization energy.
500
The correctly written and balanced equation for: solid zinc plus oxygen gas yields zinc (II) oxide
What is 2Zn + O2 --> 2 ZnO
500
How many atoms are in 75.0 grams of Ca?
What is 1.13 X 10^24 atoms