Multiple Choice 2015-16

Question	Answer	Point
What are there more of, chemicals or elements?	There are more chemicals than elements.	There are millions of chemicals in the world.
What experiments did John Dalton carry out?	John Dalton did experiments to break down chemicals until they could not be split any further.	During the 1800s, John Dalton did experiments to break down chemicals until they could not be split any further.
What are chemicals that can not be split into other chemicals called?	Chemicals that do not split into other chemicals are known as elements.	Dalton found some chemicals do not split into other chemicals, these are known as elements.
What is an element made of?	An element is made of only one type of particle.	Elements are made of only one type of particle.
What determines the element?	The type of particle determines the element. Each element has a unique number of protons.	The type of particle determines the element (chemical).
What are chemicals called that are made of more than one element chemically bonded together?	Chemicals made of more than element chemically bonded are known as compounds.	Dalton found some chemical do split into other chemicals, these are known as compounds.
What is a compound made up of?	Compounds are made up of more than one type of particle.	Compounds are made up of more than one type of particles.
What did Dalton find out when he split compounds?	Dalton found compounds always split into the same proportions.	Dalton found compounds always split into the same proportions.
How many elements are there and where can we find this list?	There are only around 100 types of atoms (elements) to make up the millions of chemicals.	There are only around 100 types of atoms (elements) to make up the millions of chemicals.
What is an atom?	Atom is the smallest part of an element.	Atoms are the smallest part of a chemical, and can not be split chemically.
What is a molecule?	Molecules are atoms that are bonded together.	Groups of bonded atoms are called Molecules.
What is an element?	A chemical made up of only one type of atom.	Elements are made up of only one type of atom.
What is a compound?	Compounds are made up of more than one type of atom, in a fixed combination.	Compounds are made up of more than one type of atom, in a fixed combination.
What is a mixture?	A Mixture is a collection of different particles in the same place.	A Mixture is a collection of different particles in the same place.
How do we represent chemicals universally?	chemical symbols and formulae for elements and compounds	Each element has a chemical symbol.
What rules apply to all chemical symbols?	Some chemical symbols consist of two letters (as there are more than 26 elements). Chemical symbols start with a capital letter.	Some chemical symbols consist of two letters (as there are more than 26 elements). Chemical symbols start with a capital letter.
What does the chemical formulae of a compound show?	Compounds have chemical formulae which show the elements in the compound.	Compounds have chemical formulae which show the elements in the compound.
How can you tell a compound from the formula of it?	Compounds have chemical formulae with more than one capital letter in.	Compounds have chemical formulae with more than one capital letter in.
How can you tell an element from the formula of it?	Elements have chemical formulae with only one capital letter in.	Elements have chemical formulae with only one capital letter in.
How can we identify the number of elements in a compound?	We identify the number of elements in a compound by counting the number capital letters in the formulae.	Students can identify the number of elements in a compound from its formulae.
Identify the number of element and atoms in the following formulae: CO Co NaOH MgO MgSO4 CaCO3 CaCl What are the elements in the above formulae?	CO 2 atoms, 2 elements. NaOH 4 atoms, 3 elements. MgO 2 atoms, 2 elements. MgSO4 6 atoms, 3 elements. CaCO3 5 atoms, 3 elements. CaCl 2 atoms, two elements. CO2 carbon and oxygen. NaOH sodium, oxygen and hydrogen. MgO magnesium and oxygen. MgSO4 magnesium, sulfur and oxygen. CaCO3 calcium, carbon and oxygen. CaCl calcium and chlorine.	Students can identify the number of atoms in a compound from its formulae.
How can you represent a mixture in writing?	Mixture formulae have a plus sign in.	Mixture 'formulae' have a plus sign in.
What is the conservation of mass?	conservation of mass changes of state and chemical reactions	There is no change of mass during a change of state as no particles are destroyed. This is known as the conservation of mass.
What happens to the mass of particles in a chemical reaction?	There is no change of mass during chemical reactions as no particles are destroyed. This is known as the conservation of mass.	There is no change of mass during chemical reactions as no particles are destroyed. This is known as the conservation of mass.
What is a chemical reaction?	Chemical reactions result from the rearrangement of atoms	Chemical reactions result from the rearrangement of atoms
What is Brownian motion?	Brownian motion in gases is the proof of particles too small to see. The random motion of the large particle can only be explained by smaller particles hitting it.	Brownian motion in gases is the proof of particles too small to see. The random motion of the large particle can only be explained by smaller particles hitting it.

Mod	Number of Questions
0S	10
1B	10
1C	10
1P	10
BI	5