Elements Compounds And Mixtures Flashcards
What is an Element
An element is a substance that consists of only one type of atom and it cannot be broken down into anything simpler by chemical means
What is an Atom?
An atom is the simplest particle of an element that can exist on its own in a stable environment
What is a Molecule?
A molecule is a particle that has 2 or more atoms chemically joined together.
What is a Period?
A period is a horizontal row in the periodic table
What is a Group ?
A group is a vertical column in the periodic table.
What does Malleable mean?
Malleable means can be hammered into shape
What does Ductile mean?
Ductile means can be drawn into wires.
The periodic table is split into ……… and …… ……….?
Metals and non metals
What is a Compound?
A compound is a substance formed when 2 or more different elements are chemically combined.
what is a Mixture ?
A mixture is 2 or more substances mixed together which are usually easy to separate
What are the properties of metals ?
hard,
conduct electricity and heat,
high density,
high lustre,
malleable,
high melting point,
High boiling point,
What side are the metals on ?
The left side of the periodic table
What are the properties of non metals?
Brittle, do not conduct electricity, dull, gas liquid or solid at room temperature.
What does magnesium look like before , during and after it burns?
Before: grey shiny
During: bright white light
After: white ash
Name 5 elements
Hydrogen
Helium
Lithium
Magnesium
Boron
Carbon
Silver
Gold
Nitrogen
Oxygen
Is hydrogen a metal or not ?
Hydrogen (H) is a non metal
Where does the table split?
At Al (aluminium)
Name some solid elements
Magnesium, aluminium, silicon, phosphorus, lead, gold, silver
Name some gasses on the periodic table
Hydrogen, helium, nitrogen, oxygen, argon, radon , neon, krypton.
Name some liquids on the periodic table of elements
Bromine, mercury
Magnesium+ nitrogen
Magnesium nitride
Nickel + iodine
Nickel iodide
Magnesium+ nitrogen + oxygen
Magnesium nitrate
Calcium+ carbon+ oxygen
Calcium carbonate
Lithium + nitrogen
Lithium nitride
Sodium + nitrogen+ oxygen
Sodium nitrate
Tin + oxygen
Tin oxide
When do you use -ide
When there’s 2 elements
When do you use -ate
When there’s 3 elements including oxygen
Which elements make magnesium oxide
Magnesium and oxygen
How do you make magnesium oxide
Burn magnesium in air.
Which elements make iron sulfide?
Iron and sulfur
How do you make iron sulfide?
Heat a mixture of iron and sulfur. Iron is dark grey and sulfur is a yellow powder. The mixture glows and the sulfur burns with a blue flame.
Word equation for iron sulfide
Iron+ sulfur= iron sulfide
What does iron look like
Grey shiny solid
What does sulfur look like
Yellow dull powder
What does iron sulfide mixture look like
Grey flecks with yellow flecks
What does iron sulfide look like
Grey solid, not shiny
Are these magnetic
A. Iron
B. Sulfur
C. Iron sulfur mixture
D. Iron sulfide
A. Yes
B. No
C. Iron is but sulfur isn’t
D. No
Are these soluble in xylene
A. Iron
B. Sulfur
C. Iron sulfur mixture
D. Iron sulfide
A. Insoluble
B. Soluble
C. Iron insoluble but sulfur soluble
D. Insoluble
What do these look like with acid?
A. Iron
B. Sulfur
C. Iron sulfur mixture
D. Iron sulfide
A. Bubbles
B. No reaction
C. Bubbles
D. Rotten eggs smell
Do all elements have the same properties
No, Different elements have difterent properties. In a mixture the elements behave as if they were on their own. A compound is a new material that has its own properties.
Tell me about the compound of water
Compound is a liquid. Made of hydrogen and oxygen.
Tell me about the compound of carbon dioxide
It’s a gas. Made of carbon and oxygen
Tell me about the compound of sodium chloride
It’s a solid. Made of sodium and chlorine.
Can you lays predict how a compound will turn out
No, you can’t predict the properties of a compound by looking at the properties of the elements that are used to make it.
E.g. hydrogen and oxygen are both gases but together make a liquid
