Classifcstion Of Living Matter
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What are the horizontal rows called
Rows , periods
What is the atomic number
Number of protons in the nucleus . This number identifies the element
What number identifies the element
Atomic number
What is the mass number
Number of protons and neutrons together in the nucleus
Describe elements in general like magnesium , oxygen and mercury
Simpler substances, that can’t be broken into simpler substances by chemical means
What group are sodium and potassium in and decribe them
Group 1 , light metals , highly reactive with water - give off hydrogen when doing so
What group are chlorine and fluorine in and decribe them
Group 7 , non metals , react with metals to form salts , poisonous
What group are helium and argon in and decribe them
Group 0 , inert gasss , room Tempreature , non reactive with other elements (few rare exceptions)
What group are magnesium and calcium in and decribe them
2, silvery metals , react with acids to form hydrogen gas
What is an element
A substance that can’t be broken into simpler substances by chemical means
What is a compound
2/ more elements joined together by chemical bond . Can be broken down into simpler substances by chemical means
What substances have oxygen present
Ate / ite / oxide
What substances don’t have oxygen present
Ide
What is water made of
Hydrogen and oxygen
What 2 groups van elements be classified as
Metals and non metals
Name 5 qualities of metal substances
Luster High densities Malleable Ductile Conducts heat/ electricity
Give 5 qualities of non metals
Dull/ no luster Low densities Brittle Not ductile Insulator
Where are metals and no metals on the table
Metals on left Non metals on right
How would a compound be seperated
My chemical means
How would a mixture be seperated
By physical means
Give 5 qualities of mixtures
Impure substance No energy absorbed when substances mixed Physically seperated Consists of any substance added together Substances mix in any quantities / proportions
Give 5 qualities of compounds
Pure substance Energy is absorbed when elements combine to form compounds Chemically seperated Consist of elements bounded together chemically Constituent elements combine in fixed properties
How can sorting be possible
Must consist of 2 or more solids to seperate Particles of mixed substance must be big enough for tweezers
How can a substance be seperated by a magnet
One of the substances must be magnetic