Definitions :) Flashcards
(14 cards)
1
Q
Atom
A
The smallest particle of an element that retains its identity in a chemical reaction.
2
Q
Molecule
A
A neutral group
of non-metal atoms
covalently bonded.
3
Q
Element
A
A substance that is made up of one type of atom, defined by its atomic number.
4
Q
Compound
A
A substance made up of of different element atoms
- joined together by chemical bonds
- in a fixed ratio.
5
Q
Atomic number
A
The number of protons in the nucleus of an atom of an element.
6
Q
Mass number
A
The total number of protons and neutrons in the nucleus of an atom.
7
Q
Ionic Bond
A
- between metals and non-metals
- through electrostatic attraction
- transfer of electrons
- forming a crystalline lattice
8
Q
Covalent Bond
A
- between non-metals
- sharing of electrons
- discrete molecules
9
Q
Metallic Bond
A
- between metals
- delocalised valence electrons
- sea of delocalised electrons surrounding metal cations
10
Q
Precipitate
A
Insoluble solid that settles out of solution from two aqueous solutions.
11
Q
Symbol
A
indicates a substance’s state of matter; aqueous, solid, gaseous, or liquid
12
Q
proton
A
- positive
- subatomic particle
- located in an atom’s nucleus
13
Q
electron
A
- negative
- subatomic particle
- located in an atom’s electron cloud
14
Q
neutron
A
- neutral charge
- subatomic particle
- located in atom’s nucleus
