Module 1 Flashcards
What is the smallest particle of matter?
An atom
How many elements are on the periodic table?
Around 118
How many types atoms does an element have?
An element has only 1 type of atom
Elements can be…
Natural or man made
What 2 elements are liquid at room temperature?
Mercury (Hg) and Bromine (Br)
What is a period on the periodic table?
A period is the elements organised in rows
What is a group on the periodic table?
A group is the arrangement of columns on the table
What is group 1 on the periodic table?
The Alkali Metals
What are groups 2 and 3 on the periodic table called?
Transition Metals
What is group 7 on the periodic table called?
The Halogens
What is group 8 on the periodic table called?
The Noble Gases
What are all elements given?
A symbol Ex/ Hydrogen= H
What side of the periodic table are metals on?
Left hand side
What side of the periodic table are non metals on?
The right hand side
What are the properties of metals?
Metals are shiny and electrical conductors
What are the properties of non metals?
Non metals are dull and don’t conduct electricity expert Carbon! (In the form of graphite)
When are compounds formed?
When elements react together
Why do the properties of a compound vary?
Compounds have different properties based on the elements they are made from
How are the elements in a compound held together?
The elements in a compound are chemically bonded together and can’t be separated easily
What do most compound that end in -IDE contain
The 2 elements indicated in the name
What do compounds that end in -ITE and -ATE contain?
The elements in the name and the additional element oxygen
What process can be used to break a compound into its elements?
Electrolysis
In a physical change what is formed?
No new substances are formed!!!
Are physical changes easy or hard to reverse?
Easy
A change of state it what?
A physical change
What are the changes of state?
Melting, boiling, condensation, solidification, sublimation
All chemical reactions involve what?
The formation of one (or more) new substances
Are chemical changes easy or hard to reverse?
Hard
How can chemical reactions be identified?
Colour change, gas given off and precipitate formed
How else can chemical reactions be identified?
Chemical reactions can be identified by energy changes
What is ans EXOTHERMIC reaction?
And exothermic reaction releases heat into the surroundings so the products have less chemical energy than the reactnats
What is an ENDOTHERMIC reaction?
An endothermic reaction takes in heat energy from the surroundings so the products have more chemical energy than the reactants
What is a reactant?
A reactant is a substance that reacts with something else to form something new
What is a product?
A product is the result of two reactants reacting with each other and forming something new
What is the state symbol for solids?
s
What is the state symbol for liquids?
l
What is the state symbol for gasses?
g
What is the state symbol for solutions?
aq (aqueous)
