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THE ATOM AND THE PERIODIC TABLE. STATE STANDARD SPI 0807.9.9 Use the periodic table to determine...
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Transcript of THE ATOM AND THE PERIODIC TABLE. STATE STANDARD SPI 0807.9.9 Use the periodic table to determine...
THE ATOM AND THE PERIODIC TABLE
STATE STANDARD
SPI 0807.9.9 Use the periodic table to determine the properties of an element.
OBJECTIVES
I can identify the parts of an atom I can compare and contrast the relative masses of the
different parts of an atom I can calculate atomic mass
REPRESENTATION OF AN ATOM
ELEMENT TILE
STATE STANDARD
SPI 0807.9.9 Use the periodic table to determine the properties of an element.
OBJECTIVES
I can calculate atomic mass correctly 8 out of 10
Calculating Atomic Mass
APEAtomic# = #of Protons = #of Electrons
For Oxygen, O, the atomic # is 8
So, O has 8 Protons and 8 Electrons.
Calculating Atomic Mass
MAN (Mass #)- (Atomic#)= ( # of Neutrons)
Calculating Atomic Mass
Oxygen has an Atomic # of 8Therefore O has: 8 Protons 8 Electrons
To calculate # of Neutrons: First round the atomic
mass from 15.99 to 16 Then subtract the
number of Protons.
16 Mass # - 8 Atomic # 8 # Neutrons
ISOTOPES
ISOTOPES are atoms that have the same number of protons but different number of neutrons.
ISOTOPES
Isotopes of an element share the same chemical properties and most of the same physical properties.
STATE STANDARD
SPI 0807.9.9 Use the periodic table to determine the properties of an element.
OBJECTIVE
I CAN ACCURATELY DRAW THE BOHR ATOMIC MODEL FOR THE FIRST 20 ELEMENTS
BOHR’S MODEL OF THE ATOM
Niels Bohr (1913): studied the light produced when atoms were excited by heat or electricity.
Bohr proposed that electrons are in orbits & when excited jump to a higher orbit. When they fall back to the original they give off light.
BOHR’S MODEL OF THE ATOM
BOHR’S MODEL OF THE ATOM
BOHR’S ATOMIC MODEL
Bohr's model: -electrons orbit the nucleus like planets orbit the sun
Each orbit can hold a specific maximum number of electronsORBIT (n) MAX # OF
ELECTRONS1 22 83 184 32
BOHR ATOMIC MODEL FOR NEON