Dalton atomic model

Democritus called the particles ‘atomos’ meaning _________

indivisible

The IUPAC symbol for copper is ____

Cu

Bromine is a __________ at room temperature

Red brown liquid

Sulphur is ________

non-metal

The melting point of Copper is _______

1083°C

Use Dalton’s model to describe what an element is like?

The atoms in an element are all identical and each element has it's own type of atom.

Describe what we know about spacing and movement particles in ice,water,steam.

In ice the particles are close together and vibrate in their fixed position.

In water the particles are close together but can move past each other.

In steam, particles are far apart and move freely in all directions.

Draw a table to compare the for physical properties of metals and non-metals

What are physical properties?

the properties that describe a substance are physical properties.

Name some physical properties

Which physical properties are now us to find the state of an element at room temperature

Matching point and boiling point

Draw Dalton’s symbols for the element

Give IUPAC symbols for the elements

C- carbon CI - chlorine F - Fluorine pb- lead cu- copper Mg - magnesium

Why are international symbols useful

All countries use the same symbols so that all scientist can communication with each other even if they speak different languages

The melting point of gallium is 30°C what change will a car if liquid a gallium is removed from hand

If liquid gallium is removed from the hand it will be come solid.

Explain some changes of state

Melting - change of state from solid to liquid Sublimation - changing from solid to gas condensation - Changing from gas to liquid evaporation - Changing from liquid to gas

Explain Dalton’s theroy