periodic table of elements. element an element is a substance that is made up of one kind of atom...
TRANSCRIPT
ElementElement
An element is a An element is a substance that is substance that is made up of made up of ONE kind ONE kind of atom onlyof atom only..
e.g. Carbon
An atom is made up of An atom is made up of ::
•___________________
•___________________
•________________
ProtonsProtons
Are small Are small __________ __________ charged particlescharged particles found in the _______ found in the _______ of an atom.of an atom.
+ ve
NeutronNeutronss
Are small Are small particlesparticles with _________ with _________ found found in the _______ of an in the _______ of an atom.atom.
ElectronElectronss
Are very tiny Are very tiny ___________charged___________charged particlesparticles that move that move ___________________ of ___________________ of an atom.an atom.
- ve
ElementElement
Each element has its Each element has its own symbol made up own symbol made up of one or two letters. of one or two letters.
There are There are approximately 110 approximately 110 different known different known elements.elements.
ElementElement
The first letter is The first letter is always a CAPITAL always a CAPITAL letter.letter.If there is a second If there is a second letter it is always a letter it is always a SMALL letter.SMALL letter.
The Periodic Table The Periodic Table of Elementsof Elements
All 110 elements can be arranged in a table that shows the relationships between the different elements.
The Periodic Table The Periodic Table of Elementsof Elements
Each element is arranged according to its ______ ________.
Atomic NumberAtomic Number
Each element of the periodic table has its own atomic number.
The atomic number is equal to the _________________ in the nucleus of the atom.
H 1Hydrogen
1
He 2
Helium
2
Li 3
Lithium
2. 1
Be 4
Beryllium
2. 2
B 5
Boron
2.3
C 6
Carbon
2.4
N 7
Nitrogen
2.5
O 8
Oxygen
2 6
F 9
Fluorine
2.7
Ne 10
Neon
2.8
Na 11
Sodium
2. 8. 1
Mg 12
Magnesium
2. 8. 2
Al 13
Aluminium
2. 8. 3
Si 14
Silicon
2. 8. 4
P 15
Phosphorus
2.8. 5
S 16
Sulfur
2. 8. 6
Cl 17
Chlorine
2. 8. 7
Ar 18
Argon
2.8. 8
K 19
Potassium
2.8.8.1
Ca 20
Calcium
2.8.8.2
Periodic Periodic TableTable
S 16
Sulfur
2. 8. 6
Atomic number
nameelectron arrangement
symbol
KEY
Look at the next picture of the periodic table.
Where are the metals found?
Where are the non-metals found?
H 1
Hydrogen
1
He 2
Helium
2
Li 3
Lithium
2. 1
Be 4
Beryllium
2. 2
B 5
Boron
2.3
C 6
Carbon
2.4
N 7
Nitrogen
2.5
O 8
Oxygen
2 6
F 9
Fluorine
2.7
Ne 10
Neon
2.8
Na 11
Sodium
2. 8. 1
Mg 12
Magnesium
2. 8. 2
Al 13
Aluminium
2. 8. 3
Si 14
Silicon
2. 8. 4
P 15
Phosphorus
2.8. 5
S 16
Sulfur
2. 8. 6
Cl 17
Chlorine
2. 8. 7
Ar 18
Argon
2.8. 8
K 19
Potassium
2.8.8.1
Ca 20
Calcium
2.8.8.2
Periodic Periodic TableTable
Metals
Non-
metals
Special
Electron ArrangementElectron ArrangementThe electrons are arranged around the nucleus of an atom in ______________.
The 1st energy levels holds a maximum of :
The 2nd energy levels holds a maximum of :
The 3rd energy levels acts as if it is full when it has :
electronelectronss
i.e. Magnesium 2. 8. i.e. Magnesium 2. 8. 22
Mg
1st energy level2nd energy level3rd energy level
Magnesium atomic no. 12Magnesium atomic no. 12It has 12 protons & It has 12 protons & ______________________..
Mass NumberMass Number
Each element has a different mass.
Both protons and neutrons are given a mass of 1.
Because electrons are so small we ignore their mass.
Mass NumberMass Number
The mass number of an atom
= the ___ of the ________and the ________in the nucleus
of an atom
Cl35
17
The larger number is the MASS NumberThe smaller number is the ATOMIC Number
Write down all the information that the box provides.
Cl35
17
•The element is _________.
•It has the symbol ___.
•It has an atomic no. of ___.
•It has ___ protons in its nucleus.
It tells us :It tells us :
Cl35
17•It has __ electrons
going around the nucleus.
•It has a mass number of ___.
•It has __ neutrons in its nucleus.
•The electron arrangement is __-__-__.
It tells us :It tells us :