Elements, Compounds And Mixtures Flashcards
What are the 6-10 elements
- Carbon
- Nitrogen
- Oxygen
- Fluorine
- Neon
What are the 11-15 elements
- Sodium
- Magnesium
- Aluminium
- Silicon
- Phosphorus
What are the 16-20 elements
- Sulfur
- Chlorine
- Argon
- Potassium
- Calcium
What is the symbol for hydrogen
H
What is the symbol for helium
He
What is the symbol for lithium
Li
What is the symbol for beryllium
Be
What is the symbol for boron
B
What is the symbol for carbon
C
What is the symbol for nitrogen
N
What is the symbol for oxygen
O
What is the symbol for fluorine
F
What is the symbol for neon
Ne
What is the symbol for sodium
Na
What is the symbol for magnesium
Mg
What is the symbol for aluminium
Al
What is the symbol for silicon
Si
What is the symbol for phosphorus
P
What is the symbol for Sulfur
S
What is the symbol for chlorine
Cl
What is the symbol for Argon
Ar
What is the symbol for potassium
K
What is the symbol for calcium
Ca
How many naturally occurring elements are there
92
List 2 examples of compounds
Water= hydrogen + oxygen
Table salt= sodium + chlorine
What is an element
A pure substances made up of one kind of atom
What is an atom
An atom is made up of 3 sub atomic particles, protons, neutrons and electrons
What does an electron do
Electrons orbit the nucleus which is located at the centre of the atom and houses the protons and neutrons
What charge do protons have
Positive
What charge does electrons have
Negative
What charge does neutrons have
Neutral
What is the atomic number related to
The number of protons = the atomic number
How can u find the number of neutrons
Mass number- atomic number = number of neutrons
How can u find the mass number
The sum of protons and neutrons
How many electrons can each electron shell hold
1- a max of 2
2- a max of 8
3- a max of 8
What 2 elements have electrons in the 4th shell
Potassium and calcium
Describe a compound
More than one element makes a compound. In compounds the atoms of one element are bonded very tightly
Describe a mixture
Mixtures can be made up of 2 or more elements or compounds. The substances that make up mixtures can be usually be easily separated
When creating a compound what are the 2 elements called
They are called reactants and they produce a product
What are the first five elements.
- Hydrogen
- Helium
- Lithium
- Beryllium
- Boron