The ________ is a chart created by chemists to organize the elements according to repeated changes on properties.
Periodic Table
235U --> 231Th + 4He
What type of decay is the above reaction?
Alpha
Elements in the 17th group are known as Halogens. Each element in that group carries what charge during bonding?
1-
A solution with a pH of 9 is acidic, basic, or neutral?
______ is the measure of the average kinetic energy of particles in a substance.
Temperature
Does number of valence electrons increase or decrease as you move from left to right across the Periodic Table?
Increase
If you have 200 grams of radioactive Polonium with a half-life of 50 years. How much is left after 100 years?
50 grams
Ca + O2 -> CaO
What type of reaction is this?
Synthesis
A strong acid will have a ____ pH value than a weak base.
lower, higher
lower
During the process of melting, is energy absorbed or released?
absorbed
To become stable, Sodium will ______ electrons and form an positive ion.
lose/give away
Which type of nuclear reaction is used in nuclear power plants?
Fission
When forming table salt, also referred to as sodium chloride, which element in the bond gains an electron?
Chlorine
Common household cleaning products like drain cleaner and Windex are examples of a ____ solution.
Basic
When a substance changes from a liquid to a solid, the particles are speeding up or slowing down?
slowing down
______ are atoms of the same element that have different numbers of neutrons.
Isotopes
Fusion
What is the name of the following chemical formula?
KCl
Potassium chloride
What do we call a solution that conducts electricity?
electrolyte
According to Boyle's law, if temperature is held constant and the pressure of a substance increases, what happens to the volume?
decreases
The atomic number of manganese is 25; its mass number is 55. How many neutrons does it have?
30
In which type of nuclear decay does a neutron split into a proton, and eject an electron from the nucleus of the atom?
Beta
__ Fe + __ S2 -> __ Fe2S3
4, 3, 2
After tasting the salt in the ocean water on a visit to the beach, you recall from your physical science class that the salt is the ____ is the ocean water solution.
solute
According to Charles Law, if pressure is constant, and the temperature of a substance increases, what will happen to the volume of the substance?
increases