Symbols, Formulas and Equations. Flashcards
1
Q
What is an element?
A
A substance which consists of only one type o atom - cannot be broken down by chemical means
2
Q
What’s a compound?
A
Consists of two or more different elements chemically bonded.
3
Q
What is a diatomic molecule?
A
Two atoms covalently bonded in a molecule (-gen, -ine)
4
Q
Hydrochloric acid.
A
HCL
5
Q
Sulfuric acid
A
H2SO 4
6
Q
Nitric acid
A
H N03
7
Q
Ammonia
A
NH 3
8
Q
Ethanoic acid
A
CH3 C OOH
9
Q
What is valency?
A
The combining power of an atom and an ion
10
Q
Valency of metals
A
Number of elections it has to lose
11
Q
Valency of non metals
A
Amount of electrons it has to gain
