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Starter - Elements and symbols Starter - Elements and symbols that you should know:that you should know:

Part 1 – The obvious ones:

1) Hydrogen

2) Helium

3) Lithium

4) Beryllium

5) Boron

6) Carbon

7) Nitrogen

8) Oxygen

9) Fluorine

10)Neon

11)Magnesium

12)Aluminium

13)Silicon

14)Phosphorus

H

He

Li

Be

B

C

N

O

F

Ne

Mg

Al

Si

P

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Some more obvious ones:15)Sulphur

16)Chlorine

17)Argon

18) Calcium

19) Zinc

The less obvious ones:1) Sodium

2) Potassium

3) Iron

4) Copper

5) Silver

6) Tin

7) Gold

8) Mercury

9) Lead

S

Cl

Ar

Ca

Zn

Na

K

Fe

Cu

Ag

Sn

Au

Hg

Pb

1. Atoms

Elements Compounds

2. The structure

of an Atom

3. Symbols for

elements

4 Elements of the periodic

table

Chemistry

Elements

Chemistry

Elements

5 Making

Compounds

6 Chemical reactions

6 Chemical reactions

Objective: What is everything made of?

• Outcomes:

• LO1 – know how electrons are arranged around the atom(Level 4)

• LO2 – work out the number of neutrons using atomic and mass numbers

of an atom (Level 5)

• LO3 – explain what an isotope is

(Level 6/7)

Starter - Atomic structureStarter - Atomic structureStarter - Atomic structureStarter - Atomic structure

Atomic Structure

Starter - Atomic structureStarter - Atomic structureStarter - Atomic structureStarter - Atomic structure

Atomic Structure

Each electron in an atom is at a particular energy level (or shell)

Electrons fill the lowest energy levels first (nearest to the nucleus)

The first shell can take a maximum of 2 electrons, the second shell can take 8, and the third shell can take 8

LO1- ElectronsLO1- ElectronsLO1- ElectronsLO1- Electrons

Electrons

LO1- Electron ShellsLO1- Electron ShellsLO1- Electron ShellsLO1- Electron Shells

Electron shells

1.The atomic number is the number of protons in the nucleus

2.In an atom, the number of electrons always equals the number of protons

3.Atoms do not have an overall electrical charge

LO2 - Atomic numberLO2 - Atomic numberLO2 - Atomic numberLO2 - Atomic number

Atomic Number

LO2 - Atomic numberLO2 - Atomic numberLO2 - Atomic numberLO2 - Atomic number

Atomic Number

LO2 - Mass numberLO2 - Mass numberLO2 - Mass numberLO2 - Mass number

Mass Number

1.The mass number is the total number of protons and neutrons in an atom

2.The number of neutrons can be calculated by subtracting the atomic number from the mass number

Mass numberMass numberMass numberMass number

Mass Number

Mass numberMass numberMass numberMass number

Mass Number

CalculationsCalculationsCalculationsCalculations

Calculations

1.Isotopes are atoms of the same element that have different numbers of neutrons (e.g. carbon-12 and carbon-14)

2.Isotopes have the same atomic number but different mass numbers

LO3 - IsotopesLO3 - IsotopesLO3 - IsotopesLO3 - Isotopes

Isotopes

IsotopesIsotopesIsotopesIsotopes

Isotopes

What have we learnt today?

• I can:

• LO1 – know how electrons are arranged around the atom(Level 4)

• LO2 – work out the number of neutrons using atomic and mass numbers of an atom (Level 5)

• LO3 – explain what an isotope is

(Level 6/7)

Plenary

• Each one test one

• Ask you neighbour a question about what you have learnt today.

Homework