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Ions, bianary ionic compounds with multivalent metals polyatomic ions

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hasanahatesscience's version from 2016-01-17 22:09

Section 1

Question Answer
ion is acharged atom that has either gained or lost electron. will gain or lose to end up with filled outer shell
if atom gains electrons the charge isnegative
if atom loses electrons charge is positive
cationsions with positive charge, same name as element
anionions with negative charge. add IDE To end of element name
ionic compoundscompounds are formed between metals and non metals. ionic bonds form when electrons are transferred between ions
ionic compounds generally formcrystals wil dissolve in water in their individual ions. hard brittle solids with high melting points
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Section 2

Question Answer
some metals can form more than one type of ionthese metals are called multivalent
polyatomic ions are compoundsthat have an ionic charge and a special name
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Section 3

Question Answer
chemical formulars are made up of letters andnumbersletters are symbols of element and number tells us how many elements are present in compound
molecular compoundsare made up of neutral atoms. formed by atoms sharing electrons in covalent bond. OCCURS BETWEEN NON METALS
combining capacitynumber of covalent bonds an atom will need to have a filled valence shell
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Section 4

Question Answer
chemical reactionsoccur between elements and compounds to produce new elements and compounds
a chemical reaction shows the reactants (starting material) on the leftthe products (ending materals) are on the right side. an arrow is used to seperate the two
word equationsuse the names of elements and compounds to represent chemical reaction. HYDROGEN + OXYGEN = hydrogen peroxide
chemical equationsuse chemical symbol to represent reactants and products also involves state of each substance (s, l , g, aq)
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Section 5

Question Answer
synthesis reactions A + B -> AB. adding things together. these reactions involve joining atoms to make a molecule or joining elements to make a compound
decompositionAB -> AC + B breaking apart. reactions involve breaking down a compound into individual atoms. reverse of synthesis.
single displacementA +BC > AC + B replacing an element. in some reactions elements reacts with a compound. in this case ONE ELEMENT REPLACES THE OTHER ELEMENT TO FORM A NEW COMPOUND.
double displacementAB + CD > AD + CB. elements in different compounds in the reactants replace each other to form new products
combustioncombustion reactions involve the burning of a chemical substance in oxygen.
metalsburn in oxygen to produce a METAL OXIDE. magnesium + oxygen > magnesium oxide
non metalnon metals burn in oxygen to produce a DIOXIDE. carbon+oxygen > carbon dioxide
all hydrocarbons burn in oxygento produce carbon dioxide and water.
hydrocarbon fuel + oxygen ->carbon dioxide + water
law of conservation of massstates that THERE IS NO CHANGE IN TOTAL MaSS OF SUBSTANCE BEFORE THE CHEMICAL REACTION COMPARED TO AFTER THE CHEMICAL REACTION.
during a chemical reactionthe atoms are NOT destroyed, but instead the atoms are rearranged.
the law of conservation of mass is obeyed in the following word expression that represents the process of photosynthesiswater + carbon dioxide > glucose + oxygen
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