Show:
Nuclear Chemistry
Chemical Reactions
Periodic Table
The Atom
Solutions and Water
100
An unstable isotope.
What is a radioisotope?
100
When one or more substances change into one or more new substances.
What is a chemical reaction?
100
The name of group two on the periodic table.
What is the alkaline earth metals
100
The smallest particle of an element.
What is an atom?
100
The foundation of all life on Earth. No life would exist without it.
What is water?
200
A ray with very high energy with no mass or electrical charge.
What is a gamma ray?
200
A substance that speeds up a reaction without being used up by the reaction.
What is a catalyst?
200
This group has seven valence electrons.
What is halogens/group seven?
200
Atoms that have the same number of protons but different numbers of neutrons.
What is an isotope?
200
Homogeneous mixtures that may be solid, liquid, or gaseous.
What is a solution?
300
Occurs when nuclei combine to produce a nucleus of greater mass.
What is fusion?
300
The most important solvent on Earth.
What is water?
300
Have characteristics intermediate between metals and nonmetals.
What are metalloids?
300
This model of the atom was suggested by J.J. Thomson, who also discovered the electron.
What is the plum-pudding model?
300
Holds water molecules together.
What are hydrogen bonds?
400
The measure of which all radioactive nuclei have a characteristic rate of decay.
What is a half-life?
400
Another name for a combination reaction.
What is a synthesis reaction?
400
The direction that atomic radius decreases on the periodic table.
What is from left to right?
400
The amount of energy required to move an electron from one energy level of the atom to the next.
What is a quantum?
400
The number of moles of a solute dissolved per liter of solution. It is used to describe the concentration of a solution.
What is molarity?
500
The atomic number in which all nuclei above it on the periodic table are radioactive.
What is atomic number 83?
500
The five different types of reactions.
What is combination, decomposition, single-replacement, double-replacement, and combustion?
500
The British physicist that arranged the elements by order of atomic number instead of atomic mass.
Who is Henry Moselely?
500
He was the first to suggest the existence of atoms.
Who is Democritus?
500
Arises due to the inward farce of water molecules toward the body of the liquid.
What is surface tension?