Show:
Atoms
Isotopes
Chemical Compounds/
Molecules
Chemical Bonding
Misc.
100
They make up all things.
What are atoms?
100
Atoms of the same element with different numbers of neutrons.
What is an isotope?
100
Substance formed by the chemical combination of two or more elements in definite proportions.
What is a chemical compound?
100
Main types of chemical bonds
What are ionic and covalent?
100
Arranged by order of atomic number
What is the periodic table?
200
The combination of protons and neutrons in the center of an atom.
What is a nucleus?
200
The total number of protons and neutrons in the nucleus of an atom.
What is a mass number?
200
The shorthand composition of compounds that scientists use.
What is a chemical formula?
200
6.02x10^23
What is Avogadro's Number?
300
He developed the concept of the atom.
Who is Democritus?
300
The weighted average of the masses of an element's isotopes
What is an atomic mass?
300
The bond associated with chemical compounds
What is an ionic bond?
300
Vertical column on the periodic table.
What is a group/family?
400
number of protons = number of electrons
Why are most atoms neutral?
400
Their nuclei are unstable and break down at a constant rate over time
What is a radioactive isotope?
400
Two atoms that share an electron
What makes a molecule a covalent bond?
400
Unit of measurement used when existing units are inadequate or don't make sense anymore.
What is a mole?
500
Atoms combined together
What is a molecule?
500
They have the same number of electrons; all isotopes of an element have the same chemical properties
What are the similarities of an isotope of an element?
500
Gases at room temperature (two)
What are hydrogen and oxygen?
500
Solids, liquids, gases and plasma
What are the main states of matter?