Particle/Kinetic Theory
Elements, Pure Substances & Mixtures
Organising Elements
Physical/Chemical Change
Chemical Symbols, Formulas & Reactions
100
Which of state of matter has particles with little to no energy?
solid
100
What is the difference between element and mixtures?
Elements are a type of element
while a mixture will have a physical combination of two or more elements/compounds.
100
Write the chemical symbol for Chlorine
Cl
100
What is the MAIN difference between a physical change and a chemical change?
Physical change doesn't form new substances while a chemical change does.
100
What elements are in the following chemical formula:
NaCl
sodium and chlorine
200
Identify one shape property for liquids
1. Takes the shape of a container they are placed in
2. Cannot be compressed
200
What is the difference between elements and compounds?
Elements only have one type of atom while compounds have two or more different atoms chemically bonded.
200
Elements in the same group of the periodic table often have:
Similar chemical properties
200
Describe three evidence of physical change
Change in shape
expansion or contraction
change in state
mixing or dissolving
non-permanent colour change
200
Carbon dioxide has one carbon atom and two oxygen atoms. Write the chemical formula
CO2
300
When a solid is heated, its particles:
Gain energy and vibrate faster.
300
What is happening here?
Mixture of compounds and elements
300
How many protons does potassium have?
(Hint = atomic number = no. of protons)
19
300
Name three pieces of evidence that a chemical change has occured.
Permanent colour change
gas produced
precipitate (solid)
change in temperature
light or sound
new substance formed
300
What does the formula H₂O tell us?
The substance contains 2 hydrogen atoms and 1 oxygen atom.
400
What will happen to the size of a blown up balloon if its placed in the freezer and why?
It will shrink because the spaces between particles will contract when heat is removed.
400
What is the image demonstrating?
mixture of elements
400
List 2 elements starting with the letter C
Chlorine, carbon, copper, cobalt, calcium, caesium, chromium
400
Is this a physical or chemical change? Why?
mixing sand and water.
physical. mixing and reversable.
400
Identify the reactants and products:
Carbonic acid (H2CO3) is an ingredient in soft drinks. When you open a can of soft drink, a decomposition reaction takes and produces water and carbon dioxide.
Reactants: Carbonic acid, Products: water and carbon dioxide
500
What happens to the movement of particles when a liquid is cooled?
The particles lose energy, move more slowly, and come closer together, eventually forming a solid if cooled enough.
500
Other than water, what is an example of a compound
Salt (NaCl), Hydrogen Peroxide (H2O2), Baking Soda (NaHCO3), Carbon Dioxide (CO2)
500
Identify one property of metals and one property of non-metals.
Metals are good conductors of electricity, while non-metals are poor conductors.
500
Is this scenario showing a physical or chemical change? Why?
Mixing baking soda and vinegar to produce carbon dioxide gas
chemical. gas produced.
500
Write a worded equation for the following scenario:
Magnesium sulfate and hydrogen gas are produced when magnesium metal is placed in a solution of sulfuric acid.
magnesium metal + sulfuric acid --> magnesium sulfate + hydrogen gas