Symbols, Formulae & Equations Flashcards
What is a Chemical Symbol?
3 marks
- Represents each Element in the Periodic Table.
- Has 1-2 letters; first letter must be a capital, second letter must be lower case.
Give an example of a Chemical Symbol.
2 marks
Mg is the correct symbol for magnesium, but mg, mG and MG are wrong.
Describe Diatomic Elements.
4 marks
- The formulae for most elements is just their symbol, except some Non-Metal Elements known as Diatomic Elements .
- They contain 2 Atoms of the Same Element Covalently Bonded together.
What are Diatomic Elements?
3 marks
Diatomic Elements are Non-Metal Elements that contain 2 Atoms of the Same Element Covalently Bonded together.
Give the Molecular formula of the following Diatomic Elements.
Hydrogen, Nitrogen, Oxygen, Fluorine, Chlorine, Bromine, Iodine, Astatine
(8 marks)
Hydrogen - H2 Nitrogen - N2 Oxygen - O2 Fluorine - F2 Chlorine - Cl2 Bromine - Br2 Iodine - I2 Astatine - At2
Give the Molecular formula of Hydrogen (Diatomic Element).
1 mark
H2
Give the Molecular formula of Nitrogen (Diatomic Element).
1 mark
N2
Give the Molecular formula of Oxygen (Diatomic Element).
1 mark
O2
Give the Molecular formula of Fluorine (Diatomic Element).
1 mark
F2
Give the Molecular formula of Chlorine (Diatomic Element).
1 mark
Cl2
Give the Molecular formula of Bromine (Diatomic Element).
1 mark
Br2
Give the Molecular formula of Iodine (Diatomic Element).
1 mark
I2
Give the Molecular formula of Astatine (Diatomic Element).
1 mark
At2
Give the Diatomic Element from each of the Molecular Formulae.
H2, N2, O2, F2, Cl2, Br2, I2, At2
(8 marks)
H2 - Hydrogen N2 - Nitrogen O2 - Oxygen F2 - Fluorine Cl2 - Chlorine Br2 - Bromine I2 - Iodine At2 - Astatine
Give the Diatomic Element from the Molecular Formulae: H2
1 mark
Hydrogen
Give the Diatomic Element from the Molecular Formulae: N2
1 mark
Nitrogen
Give the Diatomic Element from the Molecular Formulae: O2
1 mark
Oxygen
Give the Diatomic Element from the Molecular Formulae: F2
1 mark
Fluorine
Give the Diatomic Element from the Molecular Formulae: Cl2
1 mark
Chlorine
Give the Diatomic Element from the Molecular Formulae: Br2
1 mark
Bromine
Give the Diatomic Element from the Molecular Formulae: I2
1 mark
Iodine
Give the Diatomic Element from the Molecular Formulae: At2
1 mark
Astatine
What are used all over the world, no matter which language is spoken?
(1 mark)
The same chemical symbols.
What does a formula do?
3 marks
A formula gives information about the type and the number of each atom present in a Compound.