Download Atomic structure - DrBravoChemistry

Starter
Write these formulae:
1) Calcium sulphate
2) Sodium oxide
3) Magnesium phosphate
Complete these reactions:
1) Na2CO3 + HCl →
2) NH3 + HNO3 →
Atomic structure
L.O.:
 Deduce the numbers of protons, neutrons and
electrons in:
(i) an atom given its atomic and mass
number,
(ii) an ion given its atomic number, mass
number and ionic charge;
 Explain the term isotopes.
Starter: remember everything you
know about:
Proton
Neutron
Electron
Nucleons
THE STRUCTURE OF ATOMS
Atoms consist of a number of fundamental particles,
the most important are ...
Mass / kg
PROTON
NEUTRON
ELECTRON
Charge / C
THE STRUCTURE OF ATOMS
Atoms consist of a number of fundamental particles,
the most important are ...
Mass / kg
Charge / C
PROTON
1.673 x 10-27
1.602 x 10-19
NEUTRON
1.675 x 10-27
ELECTRON
9.109 x 10-31
0
1.602 x 10-19
THE STRUCTURE OF ATOMS
Atoms consist of a number of fundamental particles,
the most important are ...
Mass / kg
Charge / C
Relative
mass
PROTON
1.673 x 10-27
1.602 x 10-19
1
NEUTRON
1.675 x 10-27
ELECTRON
9.109 x 10-31
0
1.602 x 10-19
Relative
charge
1
1
1840
Calculate the mass of a carbon-12 atom; it has 6 protons, 6 neutrons and 6 electrons
THE STRUCTURE OF ATOMS
Atoms consist of a number of fundamental particles,
the most important are ...
Mass / kg
Charge / C
Relative
mass
Relative
charge
PROTON
1.673 x 10-27
1.602 x 10-19
1
+1
NEUTRON
1.675 x 10-27
1
0
1
1840
-1
ELECTRON
9.109 x 10-31
0
1.602 x 10-19
MASS NUMBER AND ATOMIC NUMBER
Atomic Number (Z) Number of protons in the nucleus of an atom
Mass Number (A) Sum of the protons and neutrons in the nucleus
MASS NUMBER AND ATOMIC NUMBER
Atomic Number (Z) Number of protons in the nucleus of an atom
Mass Number (A) Sum of the protons and neutrons in the nucleus
Mass Number (A)
PROTONS + NEUTRONS
23
Na
11
Atomic Number (Z)
PROTONS
MASS NUMBER AND ATOMIC NUMBER
Atomic Number (Z) Number of protons in the nucleus of an atom
Mass Number (A) Sum of the protons and neutrons in the nucleus
Mass Number (A)
PROTONS + NEUTRONS
23
Na
11
Atomic Number (Z)
PROTONS
THESE ALWAYS GO TOGETHER
– ANYTHING WITH 11
PROTONS MUST BE SODIUM
23
Na
11
How many neutrons in 23Na?
23 – 11 = 12
Which picture is incorrect?
Carbon-14 dating
Isotopes
Every single atom of any particular element has the
same number of protons in its nucleus, but the
number of neutrons may vary.
Atoms with the same number of protons but different
numbers of neutrons are called isotopes.
Different isotopes of the same element react
chemically in exactly the same way.
Isotopes are atoms of the same
element with different numbers of
neutrons.
Exercise 10.1
Isotopes worksheet
Answer the following questions by using one or
more of the following terms: protons, neutrons,
electrons.
a) Which are nucleons?
b) Which have the same mass?
c) Which have opposite charges?
d) Which has/have no charge?
e) Which is found outside the nucleus?
Atomic structure
L.O.:
 Deduce the numbers of protons, neutrons and
electrons in:
(i) an atom given its atomic and mass
number,
(ii) an ion given its atomic number, mass
number and ionic charge;
 Explain the term isotopes.