States of Matter
What is a solid? Draw the particles and describe how they act.
vibrate slowly and are packed close together
What is a mixture?
A substance that has molecules and compounds mixed together.
What is the table that organises and shows all the elements.
The periodic table
The positive particles in the nucleus of an atom are called?
Protons
2 signs of a chemical reaction are ....
smoke, fire, heat, light, bubbling, fizzing, smell
What is evaporation?
Were a liquid becomes a gas.
What is a compound?
A substance that has many DIFFERENT elements bonded together.
What is the element on the periodic table with an atomic number of 6.
What is Carbon?
The layers of electrons on an atom sit on the _________ ________
Electron shell
Is burning a chemical reaction? (explain your answer)
What is melting?
Substance changing from a solid to liquid
Draw a picture of a the molecule H20
H - O - H
What 4 important 'bits' of information are on each periodic tile.
Atomic ______
______ _______
_______ name
______ ________
Atomic mass, atomic number, element name, element symbol
The number of protons in the nucleus of an atom is called the ....
atomic number
Which is NOT a chemical change -
a) burning paper b) cooking chicken c) steaming coffee
c) steaming coffee
What is sublimation
When a SOLID goes directly to a GAS, missing the liquid state.
Is HCl a compound or a molecule?
BOTH a molecule AND a compound
How many PERIODS are there? What do they show?
1-7 Periods
Show the number of electron shells
The neutrally charged particle in an atom is called ....
the neutron
Boiling _______ is ___ a chemical change. It changes the state of matter from _______ to ___.
water / not / liquid / gas
Give an example of condensation.
(1) Hot steam from a shower, lands on a cold mirror - turns into water droplets.
(2) Cold can of drink on a hot day, the hot air lands on the can and cools, turns into water droplets.
Identify and count the atoms in the this GLUCOSE compound
C6H12O6
C = Carbon 6, H=Hydrogen 12, O=Oxygen 6
Total 24 atoms
How many elements are naturally made on earth?
a) 114 b) 94 c) 80 d) 160
Only 94 elements are made on earth.
This is the way we calculate the atomic mass of an atom.
Protons and neutrons in the nucleus.
What are 3 examples of a physical change
(ie) Melting, freezing, tearing, folding, cutting, evaporation,