Chemistry Flashcards

  • Created by: Connor
  • Created on: 20-11-12 19:07
what is a atom?
a atom is the smallest part of a substance
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what is a element
a element is a substance that is made up of only one type of atom
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what is a compound
a compound is when 2 or more different elements chemically bond
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what is a molecule
a molecule contains of atoms that are chemically bonded
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why do elements in the same group have similar chemical properties
they have similar properties becuase the number of group is the same of electon(s) they have on there outer shell
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what are protons
inside a atom there is a nucleas made up of protons and neutrons, protons weigh a mass of 1 and are positively charged
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what are neutrons
inside a atom there is a nucleas made up of protons and neutrons, neutrons weigh a mass of 0 and are neutral
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what are electrons
electrons surround the atom, they weigh a very low mass and they are negatively charged
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where is the mass of the atom
the mass of the atom is neutral, because the negatively charged electrons cancel out the postive proton charge making it equal
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word equation for the reaction of the alkali metal potassium
potassium + water = potassium hydroxide and hydrogen
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what is ionic bonding
when a metal reacts with a non-metaal the metal atoms lose electrons and becomes positive ions, the non metal atoms gain electrons and become negative ions
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what is covalent bonding
when atoms of two non metals combine and share electrons
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what is a ion
a ion is a charged atom
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the formular for limestone
the formular for limestone is CaCo3
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word equation for the reaction between calcium carbonate and nitric acid
calcium carbonate + nitric acid = calcium nitrate + water + carbon dioxide
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how do you make cement
powdered clay mixed with powdered limestone poured into a kiln
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what is thermal decompostion
thermal decomposition is the breaking down of a substance by heating it
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what are the reactivity series
a list of metals in the order of there reactivity, the further up the metal or the metal carbonate is, the more energy is required to thermally decompose it
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what is displacement
displacement occurs when a more reactive metal pushes a less reactive metal out of its compound
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what is reduction
where you remove oxygen from a substance
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what is a metal alloy
a metal alloy is a mixture where at least one of the substances is a metal
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how are the atoms arrganed in iron
the atoms are arrnaged in a regular way, layers that lets atom slide over each other
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what is a hydrocarbon
a hydrocarbon is a compound containing of two elements; hydrogen and caron atoms
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Other cards in this set

Card 2

Front

a element is a substance that is made up of only one type of atom

Back

what is a element

Card 3

Front

a compound is when 2 or more different elements chemically bond

Back

Preview of the back of card 3

Card 4

Front

a molecule contains of atoms that are chemically bonded

Back

Preview of the back of card 4

Card 5

Front

they have similar properties becuase the number of group is the same of electon(s) they have on there outer shell

Back

Preview of the back of card 5
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