Chemistry Flashcards
Explain what happens to valence electrons when Ionic compounds are formed.
valence electrons are transferred to another atom and charged ions are created.
Define molecular compund
A molecular compound is made up of molecules that has a formula which represents the number of atoms bonded in the molecule.
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Why would two non metals be unlikely to bond
Two non metals don’t want to bond because they both only want to gain electrons.
Define an octet
the eight electron arrangement of the outeromost electron shell of nobel gasses
Positive or negative number of a group on the periodic table meaning
The elements in that group are either have a negative valence or a positive valence.
Why does the ionic compund always equal zero?
Because there is always the same number of positive and negative ions.
Polyatomic Ion definition
Ions that have more than one atom.
Why add sodium chloride to processed food?
enhances flavour and extends shelf life
Uses for polyatomic ions
Used in baking soda, active ingredients in antacids
Downsides of putting chlorine in pool
Smells bad, bleaches hair, dries skin, and can cause breathing problems.
Phosphate Fiasco description
Laundry detergents had phosphates, laudry detergent was put into lakes and streams which made aquatic plants to grow quicker which reduced oxygen levels which killed aquatic animals.
What discovery did doctor elizabeth make?
She discovered that some pollutants are food for microbes. Used them to remove trichloroethene from soil.
