chemistry keywords

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  • Created on: 09-02-13 17:52
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Annum Hussain
Compacted ­ Squashed together
Fossils ­ The remains or traces of living organisms
Erode ­ Wear away
Decomposes ­ Breaks down
Condensed ­ When you change from gas to liquid to lose heat and change from a vapour
into a liquid, or make a vapour change to a liquid.
Photosynthesis ­ Green plants and some other organisms use sunlight to synthesize foods
from carbon dioxide and water
Water vapour - Water in a vaporous form diffused in the atmosphere but below boiling
Sedimentary rocks ­ Rock formed from consolidated clay sediments.
Igneous rocks ­ Rock formed by the solidification of molten magma
Calcium carbonate ­ A white, insoluble solid, CaCO3, occurring naturally as chalk, limestone,
marble, and calcite, and forming mollusc shells
Chemical symbol ­ A chemical symbol is a 1- or 2-letter internationally agreed code for a
chemical element
Atom ­Form chemical molecules, are the basic part of any substance.
Molecule ­ a group of particles bounded together
Compound ­ A thing that is composed of two or more separate elements
Chemical reaction ­ A chemical reaction occurs when one or more chemicals react to
become different chemicals.
Reactants ­ A substance that takes part in and undergoes change during a reaction
Element ­ A pure chemical substance consisting of one type of atom distinguished by its
atomic number
Formula ­ Shows the atoms and their respective quantity in a compound or molecule. The
chemical formula CO2 reads as carbon, one atom, oxygen, two atoms

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Annum Hussain
Metal carbonates ­ A compound containing a metal, carbon and oxygen. Example
Limestone has calcium, carbon and oxygen
Hydrochloric acid- A strongly acidic solution of the gas hydrogen chloride, HCl, in water
Digestion ­ Digestion is the process of breaking down food so that it's small enough to be
absorbed and used by the body for energy or in other bodily functions.…read more

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Cation- A positively charged ion
Crystal lattice ­ repeating pattern found in the arrangement of ionic compounds
Simplest whole number ratio of atoms that matches the relative ratio
Empirical Formula-
found in a chemical compound
Endothermic Absorption of energy from surroundings
Exothermic Release of energy to surroundings
Simplest collection of atoms from which a compound's formula can be
Formula Unit
Ionic Bond Bond formed by the attraction of oppositely charged ions
Isoelectronic Atoms, ions or compounds that have the same number of…read more

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Solvent- Substance in which another substance dissolves
Tetra- Four
Tri- Three
Variable - Something which can be changed during an experiment
Devise - Plan
Di- Two
Distinguish - Tell the difference
Elaborate- Go into more detail
Estimate- Make a rough guess based on the information given
Group - Vertical column in the Periodic Table
Isotopes - Atoms with the same number of protons but a different number of neutrons
Mono ­ One
Crystallisation - The process of making crystals also used as a…read more

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Ethanol - An important alcohol compound which can be produced industrially by the
hydration of ethane with steam in the presence of a catalyst; And naturally by fermentation.
It is used as a fuel and a solvents, it is also the main alcohol in alcoholic drinks. Its chemical
formula is C2H5OH.
Evaporation - The process where a liquid changes to a vapor. This happens at a temperature
below its boiling point but is fastest when the liquid is boiling.…read more

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Tectonic plate - Is a massive, irregularly shaped slab of solid rock, generally composed of both
continental and oceanic lithosphere.
Tectonics- Describes the movement of the earth's plates, and is caused by convection
currents within the earth's mantle.
Transition - A block of elements between groups 2 and 3 of the periodic table, having a
transition (change) of similar properties (e.g. iron, manganese, copper and zinc).…read more

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Non-metal - Elements which are poor conductors of heat and electricity, have low melting
and boiling points. If solid, then brittle.
Nucleus- Structure at the center of atoms contains protons and neutrons.
Optimum - Describes the temperature at which enzymes work best usually 38 - 40 °C.
Ores- A rock, which contains a metal or metal compound, which is quarried to extract the
Oxidation - Chemical reaction where oxygen atoms are added to make an `oxide'.…read more


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