atomic structure Flashcards
1
Q
what is the definition of an isotope?
A
atoms with the same number of protons but different numbers of neutrons
2
Q
what is the atomic number?
A
the number of protons in the nucleus of an atom
3
Q
what is the mass number?
A
the sum of the protons and neutrons in the nucleus of an atom
4
Q
what is a molecule
A
a group of atoms
5
Q
what is an element?
A
substances that cannot be broken down unto any other substances.
6
Q
what is a compound?
A
pure substances that are produced when elements combine.
7
Q
what is an ion?
A
an atom or molecule which has lost or gained one or more electrons, giving it a positive or negative electrical charge.
