atoms and electron config
What is the name of the subatomic particle with a positive charge?
proton
What is the atomic number for hydrogen?
1
If an atom has one electron in the outer shell, will it lose or gain?
lose
Is baking a cake a physical or chemical change?
chemical
Acids have a PH of ...?
less than 7
What charge does an electron have?
What is the atomic mass of magnesium?
What type of elements can undergo ionic bonding?
metals and non-metals
Identify one sign a chemical reaction has occurred
change in temp
change in colour
formation of visible gas
formation of bubbles
formation of an odour
formation of light
formation of a new solid (precipitation)
What colour would a neutral solution be using a universal indicator?
How many electrons can fit in the first shell?
2
What are the horizontal rows called?
periods
If an atom loses an electron, what will the overall charge of the ion become?
exothermic reaction
Acids release ______ into a solution.
The more _____ the more acidic the solution is
hydrogen
How many electrons can fit in the third shell?
18
elements in group 18 are also known as what..?
noble gases
What type of ion is formed when an atom gains electrons?
Name one factor that increases the rate of a chemical reaction
temperature
surface area
concentration
or catalyst
Complete the equation
Metals + acid --> _________ + ______________ ?
salt + hydrogen
What is the electron configuration for potassium?
2,8,8,1
list 2 properties of metals
mellable
ductile
how many electrons will potassium lose/gain?
lose 1
what is the name of the theory that explains why chemical reactions occur?
Complete the equation
sodium hydroxide + hydrochloric acid --> _______
sodium chloride + water