Chemistry 1

bethf6's version from 2015-05-11 18:00


Question Answer
What tells us the amount of protons and electrons in an atom?The atomic number (the bottom number)
What tells us the total amount of protons and neutrons in an atom?The mass number (the top number)
Which side of the periodic table has metals?The left side
Which side of the periodic table has non-metals?The right side
What is special about the last group on the periodic table?They are noble gases so have a full outer shell of electrons.
How many electrons are in the first shell?2
How many electrons are in the second and onwards shells?8
Which bond takes electrons to gain a full outer shell?Ionic bond
Which bond shares electrons to gain a full outer shell?Covalent bond
What is two or more atoms called?A compound
What is one atom alone called?An element
How is a compound formed?It is formed from a chemical reaction and is chemically bonded
What must there be to form a balanced equation?The same amount of atoms on each side
If 6g of magnesium was reacted with 4g of oxygen, how many grams would be left?10g
What is a mixture?Two or more atoms which are not chemically bonded
What does calcium carbonate produce when heated?Calcium oside and carbon dioxide
What is the process of heating calcium carbonate called?Thermal decomposition
What does calcium carbonate produce when reacted with acid?Calcium salt, carbon dioxide and water
What is produced when you add water to calcium oxide?Calcium hydroxide
What can calcium hydroxide detect?Carbon dioxide
What does powdered limeston and powdered clay heated produce?Cement
What is produced when cement is mixed with sand and water?Mortar
What is produced when you mix cement with sand and aggregate (water and gravel)?Concrete
What is a metal ore?A rock with metal inside of it that can be extracted?
Which ways can a metal be extracted by an ore?Chemically (reduction) and electrolysis
What gas does reduction use to extract the metal?Carbon
What happenes when the ore is reduced?The oxygen is removed
What metals can be extracted by reduction?Metals that are less reactive than carbon
What metals have to be extracted by electrolysis?Metals that are more reactive than carbon eg. they can not be extracted by reduction
What is the disadvantage of electrolysis compared to reduction?It is much more expensive
What can electrolysis do to the metals that reduction cannot?It can purify the metals so they are better conducters eg. copper

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