Elements and compounds Flashcards
1
Q
elements
A
A pure substance that cannot be broken down into any simpler substances
2
Q
compound
A
Any substance that is formed by the chemical combination of two or more elements and acts like a single substance
3
Q
atom
A
The smallest unit of an element that retains the properties of that element
4
Q
proton
A
A particle in the nucleus of an atom that carries one unit of positive electric charge
5
Q
neutron
A
A particle in the nucleus of an atom that has no net electric charge
6
Q
electron
A
A particle in the space out side the nucleus of an atom that carries one unit of negative electric charge
7
Q
nucleus
A
A dense structure inside the cell
8
Q
molecule
A
A particle that contains more than one atom joined together
