chemistry c2.1

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what happens when two or more elements react together?
compounds are formed
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how do atoms and elements join together?
by sharing or transferring electrons
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by sharing or transfering electrons what happens to the electronic structures
it stables the electronic structures
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when atoms of non-matalic elements join together what is is called?
covalent bonding
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when metalic elements react with non-metalic elements the produce...
ionic compounds
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what happens when the atoms lose electrons
they form positive ions
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the atoms of non-metal gain electrons to form..
negative ions
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the ions have the stable electronic structure the same as a...
structure of a noble gas
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the oppositely charged ions attract eachother in the ionic compound what is this called
ionic bonding
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ionic bonding holds...
oppositely charged ions together in giant structures
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strong electrostatic forces of attraction act in...
all directions
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each ion in the gian structure is surrounded by...
ions with a opposite charge so it is held firmly in place
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what can we use dot and cross diagramsto represent...
the atoms and ion involved in forming ionic bonds
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ionic compounds are...
neutral
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if you know the charge of each ion in a compound how can you work out its formula
balancing the charges
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the charge on simple ions can be worked out by...
the number of the group
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transition metals charge on the ion is worked out by
the roman numeral on the name of the compound
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some ions are made up of more than...
one element
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to write out the formula for the ions with more than one element you..
use brakcets e.g Ca(OH)2
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how do atoms of nin metals achieve a stable structure?
gain electrons
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to gain electrons what has to happen?
share electrons with other atoms
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each shared pair of electrons strongly attracts two atoms what does this create
a covalent bond
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what are the substances that have aroms held together with covalent bonding called?
molecules
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how many electrons does group 7 need to gain to form a single covalent bond?
one
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what does a covalent bond only act between?
two atoms
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what makes a giant covalent structure?
joining together of atoms
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what can giant covalent structures be referred to as?
macromolecules
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How can we represent covalent compounds
through showing electrons and lines
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what size are the atoms in a metallic element?
all the same size
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what is metallic bonding?
when metal atoms pack together the electrons in the highest energy level delocalise and can move freely between atoms
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What do the delocalised electrons do ?
attract the positive ions and hold together the giant structure
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Other cards in this set

Card 2

Front

how do atoms and elements join together?

Back

by sharing or transferring electrons

Card 3

Front

by sharing or transfering electrons what happens to the electronic structures

Back

Preview of the front of card 3

Card 4

Front

when atoms of non-matalic elements join together what is is called?

Back

Preview of the front of card 4

Card 5

Front

when metalic elements react with non-metalic elements the produce...

Back

Preview of the front of card 5
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