The Basics
Periodic Table
Element, Mixture or Compound
Molarity
Acid / Base
100
What is inside the nucleus of an atom?
Protons and neutrons
100
How many electrons do elements in the first column have in the valance shell?
one
100
Gold
element
100
What is Avagadro's Number.
6.02 x 10^23
100
What pH is neutral?
7
200
What is the charge on a neutron?
neutral
200
What does the atomic number represent?
The number of protons. The number of electrons.
200
Sand
Mixture
200
How many moles of carbon are in 24 grams of carbon?
2 moles
200
How do you determine pH from pOH?
pH = 14 - pOH
300
What is different in an isotope?
the number of neutrons
300
What does the atomic weight represent?
The number of protons + the number of neutrons
300
Air
Mixture
300
How many grams of water are in 2 moles of water?
36 grams
300
What does pH actually represent?
The concentration of Hydrogen ions.
400
What part of an atom creates bonds?
The electrons
400
What does the partial number represent in the atomic weight? i.e. Why is carbon 12.01 and not merely 12?
The atomic weight is an average of the weight of the isotopes.
400
Water
Compound
400
How many grams of sugar are in .5 moles?
90 grams
400
What is the chemical equation for pH?
pH = - log [H+]
500
What did Rutherford's experiment prove?
That an atom is solid in the nucleus but the electrons are moving.
500
Who created the first periodic table?
Dmitri Mendeleev or Julius Lothar Meyer or some guy
500
Oxygen (O2)
Compound Diatomic Compound (+1)
500
How many moles of carbon dioxide are in 264 grams?
6 moles
500
How is water important on the pH scale?
Water is neutral and represents an equal concentration of H and OH
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