Matter Classification
Physical and Chemical Changes
Measurements and SigFigs
Subatomic Particles
Periodic Table
History of the Atomic Model
Ions and Isotopes
100
A snack mix is an example of this type of mixture.
What is a heterogenous mixture.
100
When one chemical changes its state of matter, the change is called
What is a physical change?
100
The significant figures of 0.0320
What is 3?
100
The atomic number tells us this.
What is the number of protons?
100
Elements in Group 1A are also known as
What are Alkali Metals?
100
Discovered the Electron
Who is JJ Thomson?
100
An atom that has a different number of protons and electrons
What is an ion?
200
This type of mixture looks uniform throughout. Saltwater is a good example.
What is a homogenous mixture?
200
Giving off heat or light is a clue that this type of a change is occuring.
What is a chemical change?
200
Prefix of the metric system equivalent to x10-6
What is micro?
200
The number of protons and electrons is the same in a...
What is a neutral atom?
200
Elements in Group 7A are also known as
What are Halogens?
200
Meaning of the greek word atomos
What is indivisible?
200
Atoms of the same element with different mass
What is an isotope?
300
A substance formed by chemically combining two or more atoms of different elements is known as
What is a compound?
300
The phase change from solid to liquid is called
What is melting
300
The number of sig figs reported for the length of an object measured with this ruler if less than 10 cm
What is 3 sig figs?
300
This subatomic particle has a negligible mass and negative charge
What is an electron?
300
The elements can be found all the way to the right of the periodic table are known as
What are noble gasses?
300
The gold foil experiment was performed by
Who is E. Rutherford?
300
How many valence electrons do most elements need to become stable?
What is eight?
400
Elements represent unique forms of these little thingies. The building blocks of everything!
What are atoms.
400
Carbon dioxide breaks down into Carbon and Oxygen
What is a Chemical Change?
400
Read the volume:
What is 25.3 mL?
400
an atom of an element has 15 protons, 15 electrons and 16 neutrons has an atomic mass of
What is 31
400
There are this many periods on the periodic table of the elements.
What is seven?
400
One of the main takeaways of Rutherford's Model of the atom is that
What is "most of the atom is empty space"?
400
An element that forms ions with a charge of -3 has how many valence electrons?
What is five?
500
Iron can be classified as
What is an Element?
500
What is the final state of matter when dry ice sublimes.
What is a gas?
500
96.7 inches to miles (1 mile = 5280 ft) (1 ft = 12 in)
What is 0.00153 miles?
500
The number of neutrons in Selenium-78
What is 44?
500
Elements in the same Group or column share similar properties because they have the same...
What is number of valence electrons?
500
This model of the atom arranges electrons in energy levels
What is the Bohr Model?
500
In what is the cation:anion ratio in Magnesium Oxide?
What is 1:1?
600
Atoms bond together to form these.
What are molecules?
600
Curling hair with a curling iron would be considered what type of change
What is Physical
600
520 nm to meters
What is 5.20 x 10-7 meters?
600
The istope name of an atom with 21 neutrons and a mass of 40 amu
What is Potassium-40?
600
Elements in the same Period have the same number of ...
What are filled energy levels?
(alt: What are electron shells?)
600
This scientist came up with the law of Definite Proportions
Who is John Dalton?
600
Chlorine has two isotopes 35Cl and 37Cl, which isotope is most abundant?
What is Chlorine-35?