Chemistry
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Where do you find the nonmetals on the periodic table
On the right and Hydrogen
Where do you find the metals on the periodic table
On the bottom and left and middle
Where do you find the semimetals
Between the metals and nonmetals
What do covalent bonds occur between
non metal and non metal
What do ionic bonds occur between
Metal (acceptor) and non metal (donor)
What is the general form of a decomposition reaction
AB to A + B
What do decomposition reactions require
Energy input (eg. heat, light, electricity)
What is an example of a decomposition reaction
2H2O -> 2H2 + O2
What are positive ions called
cations
What are negative ions called
anions
What charge do ionic compounds have
neutral
What happens in an endothermic reaction
Energy is absorbed, feels colder
What happens in an exothermic reaction
Energy is released, feels warmer
What is the formula for a single displacement reaction
A + BC -> AC + B
What does a metal and acid produce
Metal salt and hydrogen gas
What type of reaction is metal and acid
Single displacement
What are the 5 indicators of chemical change
Colour change, gas formation, energy change, precipitate formation, change in properties
What is an example of a synthesis reaction
Cl2 + H2 -> 2HCl
What is an example of a single displacement reaction
Mg + 2HCl -> MgCl2 + H2
What are the 4 ways to increase reaction rate
Temperature increase, concentration increase, larger surface area, catalysts
How do catalysts increase reaction rate
Lower activation energy
What is the form for acid carbonate reactions
metal carbonate + acid -> salt + water + carbon dioxide
What is reliability in science
the consistency and reproducibility of experimental results
What is accuracy in science
the closeness of a measurement or experimental result to the true or accepted value