This is the difference between a physical change and a chemical
What is "a chemical change changes the substance into a different substance" A physical change will change the appearance, but it will not change the substance.
100
This is the number of centimeters in one meter.
What is 100cm?
100
This is the charge of an electron, proton, and neutron, in order.
What is -, +, 0?
100
Where are the nonmetals on the periodic table and give 2 examples
What is on the right, helium, oxygen, chlorine, etc.
100
These are the 4 types of orbitals and the number of electrons that each can hold.
What is s-2, p-6, d-10 and f-14
200
Cake baking in an oven, an old car rusting, a campfire.
What are chemical changes?
200
This is the number of grams in 7.56milligrams
What is .00756g
200
Describe at least 2 parts of the first atomic theory and who came up with this first theory. (not Democritus or ancient Greeks)
Dalton:
1)What is All matter is made of atoms. Atoms are indivisible and indestructible.
2) All atoms of a given element are identical in mass and properties
3) Compounds are formed by a combination of two or more different kinds of atoms.
4) A chemical reaction is a rearrangement of atoms.
200
These are 2 characteristics of metals
What is conduct heat and electricity, shiny, ductile, malleable?
200
This is an ionic bond and the electronegativity difference that the elements would have.
What is a bond between a metal and a nonmetal in which electrons are transferred? and 1.7 or higher
300
This is the ratio of mass to volume in a substance (mass/volume).
What is density?
300
This is the scientific notation for the following number: 732500
What is 7.325 x 10^5?
300
How many protons, neutrons, and electrons?
31
Ga
69.723
If it had a charge of +3, how many electrons would it have?
31, 39, 31, 28
300
Put the elements in order of increasing electronegativity:
Nickel, Potassium, Phosphorous, Sulfur
What is Potassium, Nickel, Phosphorous, Sulfur
300
This is the formula for the compound that Potassium and Oxygen would make. It is a ___________compound
What is K2O? ionic
400
This is the density of a 50g piece of metal with a volume of 2.4cm3.
What is 20.8g/cm3?
400
5 x 10^-3cm = ___nm (1nm =1 x 10^-9m)
What is 5 x 10^-10nm?
400
Describe how Rutherford built on and changed Thomson's discovery.
What is Rutherford discovered that the atom had a positively charged nucleus and electrons were around the nucleus, rather than embedded throughout positively charged material
400
Determine which 3 group of elements (in order) are being described.
-Very reactive with water and have only 1 valence
-the d block on the periodic table
- generally unreactive group
What is alkali metals, transition metals, and noble gases.
400
The electron configuration of Cd.
What is 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10
500
This is the volume of a 90g piece of gold that has a density of 19.3g/cm3. Must have units correct for full points
What is 4.66cm3?
500
This is the number of minutes in .506years.
Bonus (50pts) This is (3.24 x 10^-3)(5.6 x 10^4)
What is 265953.6minutes
What is 1.814 x 10^2?
500
This is how the electron was discovered and who discovered it.
What is What is Thomson? He discovered it when experimenting with cathode ray tubes. He noticed that the beam was attracted to positive charges.
500
Put in order of increasing atomic radius.
francium, helium, aluminum, magnesium
What is Helium, Aluminum, Magnesium, Francium
500
Draw the lewis structure of SiO2 and what would you call it?
What is Si in the middle, double bonded to both Oxygens, Silicon Dioxide?