Chem cue cards
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Pure Substance | Matter that only contains one kind of particle
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| Mixture | Matter that contains more than one kind of particle
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| Element | A pure substance made up of two or more different elements that are chemically combined.
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| Compound | A pure substance that cannot be broken down into simpler parts by chemical methods.
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| Physical property | A substanc that can not change its scent or type of substance. Can be observed an measured without changing its identity
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| Chemical property | Ability for a substance to change or react and from a new substance.
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| Physical change | -change substance back
-go from liquid to solid
-doesn't produce new substance
-doesn't change original substance
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| Chemical Change | -Can't be reversed
-Forms a new substance
-Bubbles
-Odour changes
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| Viscosity | The resistance of liquid to flowing. Applies to liquids only.
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| Form | The shape of an object
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| Texture | The way a substance feels
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| Hardness | The resistance of a substance to be scratched.
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| Ducktivity | The ability to be stretched into a wire. Applies to metals and other solids.
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| Malleability | The ability of a substance to be hammered into a thin sheet. Applies to metals and other solids
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| Conductivity | The ability of a substance to transmit heat, sounds, or electricity.
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| Brittleness | The ability of an object to break apart or shatter easily.
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| Solubility | A solid (solute) mixing with a liquid (solvent)to make a solution (mixture)
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| Democritis | 400 AD
Came up with atomas (smallest thing possible on Earth)
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| John Dalton | 1800
Came up with modern atomic theory and that the atom was a round ball
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| J.J Thompson | 1897
Discovered electrons and made the cathode ray tube experiment:
one positive electron in the middle with four negatives around it.
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| Ernst Rutherford | 1907
Discovered nucleus and created the gold foil experiment: Atom was not round and had negative electrons floating aorund the one positive in the centre.
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| Neils Bohr | 1912
Discovered orbitals that the electrons travel on
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| James Chadwick | 1932
Discovered neutron (no electric charge but has negative charge)
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| Atom | The basic unit of a chemical element, smallest thing on Earth.
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| Electron | Subatomic particle that is found in all atoms (negative charge)
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| Subatomic Particle | A body having finite mass and internal structure
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| Nucleus | DNA holder of a cell. Central and msot important part of cell. Found in atoms
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| Proton | A subatomic particle occuring in a nucleus (positive charge)
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| Neutron | Subatomic particles, similiar to a proton bu without electric charge.
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| Alkali Metals | React rapidly when exposed to air or water. Low melting points and very soft.
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| Alkaline Earth Metals | Highly reactive but less than alkali metals. Produce bright, colourful flames. Used in fireworks
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| Halogens | Most reactive non metals. Extremely corrosive. Fluorine can be used to etch glass. Chlorine as a gas produces serious respiratory problems. Bromine causes serious skin burns.
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| Noble gases | Non-reactive
Odourless, colourless
Produce interesting colours when excited by electricity
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| Periods | Horizontal rows from groups 1-7 on the periodic table.
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| Groups | Vertical rows on periodic table
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| Metal | Shiny, ductile
Conductors of heat and electricity
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| Non-metal | Bull and brittle
Poor conductors
Good insulators
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| Metalloid |
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| Ion | positively or negatively charged atom or molecule. Atom becomes an Ion when an atom loses or gains electrons
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| Cation | Positively charged ion
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| Anion | Negatively charged ion
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Created by:
EMunoz19
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