C1.2.1 Atomic structure Flashcards
1
Q
an atom
A
the smallest particle of an element that still has its chemical property
2
Q
a molecule
A
is made from two or more atoms joined together
- joined by attractive forced or chemical bonds
3
Q
an element
A
only contains one type of atom
4
Q
atomic number
A
number of electrons
also
number of protons
5
Q
atomic mass
most of mass is in nucleus - so it is number of …..+….
A
number of protons + neutrons
6
Q
how do you find number of neutrons?
A
atomic mass - atomic number
7
Q
isotopes
A
atoms with the SAME number of PROTONS AND ELECTRONS
but DIFFERENT numbers of NEUTRONS
have the same atomic number but different mass number
8
Q
Ions
A
charged particles, they are formed when an atom, or group of atoms, lose or gain and electron
