Compound, element or mixture? How do you know? Atoms Compound, element or mixture? How do you know?

Homework Due in: Wed 8th Nov TASK Complete the SMH quiz 3 times!

Learning Objectives TWWL – about compounds, elements and mixtures – State some key ideas about atoms – Describe how atoms are different to each other – Explain how atoms are positioned in the periodic table

Is it a compound? 1 2 3 4

Is it a compound? 1 2 3 4

Is it an atom? 1 2 3 4

Is it an atom? 1 2 3 4

Is it an element? 1 2 3 4

Is it an element? 1 2 3 4

Is it a mixture? 1 2 3 4

Is it a mixture? 1 2 3 4

What is a molecule? 1 2 3 4

Key Terms EXT – Draw an example of each different type! Element Two or more different types of atom which are not chemically joined together. Mixture A substance which is made up from only one type of atom. Compound Two or more atoms which are chemically joined together. Atom Tiny particles which are the building blocks of everything. Molecule Two or more different types of atom are chemically joined together.

Key Terms Element Mixture Compound Atom Molecule Two or more different types of atom which are not chemically joined together. Mixture A substance which is made up from only one type of atom. Compound Two or more atoms which are chemically joined together. Atom Tiny particles which are the building blocks of everything. Molecule Two or more different types of atom are chemically joined together.

Key Terms Element Mixture Compound Atom Molecule Two or more different types of atom which are not chemically joined together. Mixture A substance which is made up from only one type of atom. Compound Two or more atoms which are chemically joined together. Atom Tiny particles which are the building blocks of everything. Molecule Two or more different types of atom are chemically joined together.

Key Terms Element Mixture Compound Atom Molecule Two or more different types of atom which are not chemically joined together. Mixture A substance which is made up from only one type of atom. Compound Two or more atoms which are chemically joined together. Atom Tiny particles which are the building blocks of everything. Molecule Two or more different types of atom are chemically joined together.

Key Terms Element Mixture Compound Atom Molecule Two or more different types of atom which are not chemically joined together. Mixture A substance which is made up from only one type of atom. Compound Two or more atoms which are chemically joined together. Atom Tiny particles which are the building blocks of everything. Molecule Two or more different types of atom are chemically joined together.

Key Terms Element Mixture Compound Atom Molecule Two or more different types of atom which are not chemically joined together. Mixture A substance which is made up from only one type of atom. Compound Two or more atoms which are chemically joined together. Atom Tiny particles which are the building blocks of everything. Molecule Two or more different types of atom are chemically joined together.

Chemical Formula The chemical formula of a compound tells you how many atoms of each element the molecule contains. CO2

Which one is the correct formula for water? Chemical Formula Which one is the correct formula for water? H2O h2o H2o H2O HO2 h2O

Which one is the correct formula for water? Chemical Formula Which one is the correct formula for water? H2O h2o H2o H2O HO2 h2O

Each element has a particular letter Chemical Formula CO2 Each element has a particular letter

Chemical Formula ?????? CO2 ??????

Chemical Formula oxygen CO2 carbon

The little number tells us the number of one particular atom Chemical Formula The little number tells us the number of one particular atom CO2

Chemical Formula The little number tells us the number of one particular atom CO2 In this case, there are 2 oxygen atoms

Chemical Formula CO2 If an atom doesn’t have a little number next to it, it means there is only 1 of it.

Chemical Formula He Some atoms have 2 letters instead of just one.

These atoms have a lower case letter as the second letter. Chemical Formula He These atoms have a lower case letter as the second letter.

What’s the difference between these two? Chemical Formula CO Co What’s the difference between these two?

Chemical Formula carbon CO Co oxygen cobalt

HOW MANY ATOMS? H2O

HOW MANY ATOMS? H2O H = O =

HOW MANY ATOMS? H2O H = 2 O = 1

HOW MANY ATOMS? SO3

HOW MANY ATOMS? SO3 S = O =

HOW MANY ATOMS? SO3 S = 1 O = 3

HOW MANY ATOMS? H2SO4

HOW MANY ATOMS? H2SO4 H = 2 S = 1 O = 4

HOW MANY ATOMS? NaHCO3

HOW MANY ATOMS? NaHCO3 Na = 1 H = 1 C = 1 O = 3

HOW MANY ATOMS? BaF2

HOW MANY ATOMS? BaF2 Ba = 1 F = 2

EXT – Explain the difference between a compound and a molecule. Substance Is it an atom? Is it a molecule? Is it an element? Is it a compound? Carbon dioxide (CO2) Nitrogen (N2) Neon (Ne) Oxygen (O2)

Atoms NO YES Substance Is it an atom? Is it a molecule? Is it an element? Is it a compound? Carbon dioxide (CO2) NO YES Nitrogen (N2) Neon (Ne) Oxygen (O2)

Atoms NO YES Substance Is it an atom? Is it a molecule? Is it an element? Is it a compound? Carbon dioxide (CO2) NO YES Nitrogen (N2) Neon (Ne) Oxygen (O2)

Atoms NO YES Substance Is it an atom? Is it a molecule? Is it an element? Is it a compound? Carbon dioxide (CO2) NO YES Nitrogen (N2) Neon (Ne) Oxygen (O2)

Atoms NO YES Substance Is it an atom? Is it a molecule? Is it an element? Is it a compound? Carbon dioxide (CO2) NO YES Nitrogen (N2) Neon (Ne) Oxygen (O2)

Chemical Formula O2

Chemical Formula O2 1

Chemical Formula O2 1 2

Chemical Formula 2O2 If we put a number in front of a molecule, it tells us how many of that molecule there are in total!

How many oxygen atoms are there now? Chemical Formula 2O2 If we put a number in front of a molecule, it tells us how many of that molecule there are in total! How many oxygen atoms are there now?

How many oxygen atoms are there now? Chemical Formula 2O2 If we put a number in front of a molecule, it tells us how many of that molecule there are in total! 1 How many oxygen atoms are there now?

How many oxygen atoms are there now? Chemical Formula 2O2 If we put a number in front of a molecule, it tells us how many of that molecule there are in total! 1 2 How many oxygen atoms are there now?

How many oxygen atoms are there now? Chemical Formula 2O2 If we put a number in front of a molecule, it tells us how many of that molecule there are in total! 3 1 2 How many oxygen atoms are there now?

How many oxygen atoms are there now? Chemical Formula 2O2 If we put a number in front of a molecule, it tells us how many of that molecule there are in total! 3 4 1 2 How many oxygen atoms are there now?

How many oxygen atoms are there now? Chemical Formula 2O2 If we put a number in front of a molecule, it tells us how many of that molecule there are in total! 3 4 1 2 How many oxygen atoms are there now?

Chemical Formula CO2

How many of each atom are there now? Chemical Formula 2CO2 How many of each atom are there now?

Chemical Formula 2CO2 Carbon = 2 Oxygen = 4

HOW MANY ATOMS? 3H2O

HOW MANY ATOMS? 3H2O H = 6 O = 3

HOW MANY ATOMS? 2SO3

HOW MANY ATOMS? 2SO3 S = 2 O = 6

HOW MANY ATOMS? 4H2SO4

HOW MANY ATOMS? 4H2SO4 H = 8 S = 4 O = 16

HOW MANY ATOMS? 3NaHCO3

HOW MANY ATOMS? 3NaHCO3 Na = 3 H = 3 C = 3 O = 9

HOW MANY ATOMS? 5BaF2

HOW MANY ATOMS? 5BaF2 Ba = 5 F = 10

How many atoms are there in each molecule? EXT – Are there more oxygen atoms in a million molecules of water or half a million molecules of carbon dioxide (CO2)? Show your working. How many atoms are there in each molecule?

EXT – Write the correct version of each false answer! Atoms! EXT – Write the correct version of each false answer! Atoms are tiny particles. Atoms can be seen with a magnifying glass. Atoms make up everything around us. Atoms can be split into smaller units. Matter is the name given to all the objects and materials around us. Atoms are all the same. Indivisible means that something can be separated. Extenision questions

Talk for 30 seconds! End