Both of these particles are located in the nucleus and are combined to give us the atomic mass of an atom.
What are protons and neutrons?
100
This type of bond occurs between a metal and a nonmetal.
What is ionic?
100
This form of radiation is identical to a helium nucleus and is the weakest type of radiation.
What is alpha?
100
These elements have some properties of metals and some properties of nonmetals.
What are semiconductors (or metalloids)?
100
The change of state that takes place when energy is added to a substance causing the particles to speed up to the point that they no longer have a definite shape and definite volume.
What is melting?
200
These subatomic particles orbiting the nucleus are negatively charged and have a mass of almost zero.
What are electrons?
200
Covalent bonds use these in their names to indicate the number of each element present.
What are prefixes?
200
This is the amount of time it takes for half of a radioactive material to decay.
What is half-life?
200
These elements are normally malleable, ductile, and good conductors of heat and electricity.
What are metals?
200
This temperature scale is based off of absolute zero; the theoretical temperature where the motion of all particles stops.
What is the Kelvin scale?
300
This area of the atom is positively charged and is where the atom's mass is located.
What is the nucleus?
300
This measures the amount of mass in a given volume.
What is density?
300
Gamma radiation is the strongest type of radiation and travels as this type of wave?
What is electromagnetic?
300
These elements are normally poor conductors of heat and electricity. They are also often brittle when solids.
What are nonmetals?
300
This type of energy is related to the speed of an object.
What is kinetic energy?
400
This number is like the "fingerprint" of the atom, and gives the atom its identity.
What is atomic number?
400
Chemical equations must be balanced to show that this is conserved.
What is mass?
400
This type of nuclear reaction takes place in stars and scientists are working to harness this for power generation, but have been unable to so far.
What is nuclear fusion?
400
These elements are the highly reactive metals in group 1 of the periodic table.
What are alkali metals?
400
This characteristic of a gas can increase when pressure decreases or temperature increases.
What is volume?
500
These electrons determine the chemical properties of an atom.
What are valence electrons?
500
The SI units for these are kilograms and liters.
What are mass and volume?
500
The process of an unstable isotope becoming more stable when the nucleus emits a particle of radiation along with some energy.
What is radioactivity?
500
We call the elements in group 18 the noble gases because they have this.
What is full outer energy level?
500
The characteristic of a gas that can increase when volume decreases or temperature increases.