Science of Chemistry
Matter and Energy
Atoms and Moles
The Periodic Table
Nuclear Chemistry
100
The state of matter in which atoms are furthest apart and contain the most energy.
What is gas?
100
Two or more elements chemically combined is called this.
What is a compound?
100
The number of protons in an element is shown here on the periodic table.
What is the atomic number?
100
Elements with similar properties are organized this way on the periodic table.
What is in a group or family?
100
This type of radiation occurs with the emission of a helium atom from the nucleus.
What is alpha radiation?
200
The metric unit you would use to measure the mass of an elephant.
What is a kilogram?
200
A reaction that gives off heat is called this.
What is an exothermic reaction?
200
The number of neutrons in a carbon-14 isotope?
What is 8?
200
The decrease in atomic radius moving across a period is due to this.
What is an increase in number of protons in the nucleus?
200
The most penetrating and dangerous form of radiation.
What is gamma radiation?
300
The type of change observed when ice melts.
What is a physical change?
300
This is why temperature doesn't increase while ice is melting.
What is energy is being used to melt the ice?
300
The molar mass of NaOH.
What is 40 g/mol?
300
Semiconductors are classified as this type of element.
What is a metalloid (semi-metal)?
300
Beta decay occurs when this happens.
What is a neutron decays into a proton and an electron is emitted?
400
Salt water is an example of this kind of mixture.
What is a homogeneous mixture?
400
The following graph represents this.
What is a heating curve (melting/boiling graph)?
400
The number of moles in 54 grams of water.
What is 3 moles?
400
Noble gases are not electronegative because of this.
What is they have a full shell of valence electrons (they are stable)?
400
The product of the following nuclear reaction.
What is Uranium-235?
500
The density of a solid with a mass of 3.2 grams and a volume of 1.6 milliliters.
What is 2.0 g/ml?
500
In the following graph, this is represented by section E-F.
What is the gas phase?
500
Avagadro's number represents this.
What is the number of particles (atoms/molecules) in one mole of a substance.
500
This is why ionization energy decreases going down a group.
What is extra shells of electrons shield valence electrons from the pull of protons in the nucleus?
500
The product of U-238 going through alpha decay following by beta decay.
What is Palladium-234?
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