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Chemical bond types and naming conventions (3 ES ...
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What is a chemical compound?
A substance formed by 2 or more atoms chemically joined together
Why do atoms form compounds?
To become stable by gaining, loosing or sharing electrons
Which group of elements is the most reactive? Why?
Group 17; they only need 1 electron to become stable
When a neutral atoms gains 1 electron, it becomes a NEGATIVE ion. WHY?
Because now it has more electrons that protons
What are the 3 types of chemical bonds?
Ionic bonds, covalent bonds and metallic bonds
Covalent bonds happen between METAL/NON-METAL and METAL/NON-METAL elements.
non-metal and non-metal elements
In covalent bonds, atoms GAIN/LOSE/SHARE electrons.
share
Nitrogen is in group 15. How many covalent bonds can it form?
up to 3
In ionic bonds, atoms GAIN/LOSE/SHARE electrons?
gain and lose
Ionic bonds happen betweem METAL/NON-METAL and METAL/NON-METAL elements.
metal and non-metal
An ionic bond is formed because of _________ attraction between an anion and a cation.
ELECTRICAL attraction
What type of bond will form between N and O?
covalent
What type of bond will form between Mg and O?
ionic
What do we call this compound? KF
potassium flouride
What do we call this compound? CaS
calcium sulphide
What is 'oxidation number'?
a number with a +/- sign that represents the number of electrons that an atom would gain or lose when it forms a compound
(Most) metals have POSITIVE/NEGATIVE oxidation numbers?
positive
Non-metals have POSITIVE/NEGATIVE oxidation numbers when they form an ionic bond with a metal.
negative
What is an OXYGEN HALIDE?
a combination of oxygen with an atom from the halogen group (group 17)
Name this compound: OBr2
oxygen (II) bromide
Name this compound: CO2
Carbon (IV) oxide or carbon dioxide
Name this compound: NiS
nickel(II) sulfide
Name this compound: AuF
gold fluoride
What is the correct formula for aluminum sulfide?
Al2S3
What is the correct formula for potassium chloride?
KCl
What is the correct formula for beryllium oxide?
BeO
What is the correct formula for calcium iodide?
CaI2
What is the formula for calcium nitride?
Ca3N2
Name this compound K2S
potassium sulfide
What type of bond will form between Na and F?
ionic
What type of bond will form between Br and I?
covalent


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