Elements Compounds MixturesAllVocab
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Transcript of Elements Compounds MixturesAllVocab
Matter It's Everything!
Chemistry:The study of matter and its changes
Matter:Anything that has mass and volume
Atom:The basic unit of matter
Element:A type of atom
Elements pure substance that cannot be separated into
simpler substance by physical or chemical means.
What Elements are we made up of? Most of the human body is made
up of water, H2O. Most of a human body's mass is oxygen. Carbon, the basic unit for organic
molecules, comes in second. 99% of the mass of the human body is made
up of just six elements: oxygen, carbon, hydrogen, nitrogen, calcium, and phosphorus.
CompoundsPure substance composed of two or more different elements joined by chemical bonds. Made of elements in a specific ratio
that is always the same Has a chemical formula Can only be separated by chemical means, not physically
Molecules A molecule is formed when two or more atoms join
together chemically. (they can have 2 of the same elements) A compound is a molecule that contains at least two different elements. All compounds are molecules but not all molecules are compounds. Molecular hydrogen (H2), molecular oxygen (O2) and molecular nitrogen (N2) are not compounds because each is composed of a single element. Water (H2O), carbon dioxide (CO2) and methane (CH4) are compounds because each is made from more than one element.
Molecules can be represented many ways:Chemical Formula: Structural Formula:
CH4
H2OH H
O
Ball and Stick Model: Space Filling Model:
How many atoms of each element are present in one molecule of:
N. H S. O
(NH4)2SO32 8 1 3
Pure Substance:= An element or a compound(Any substance that can be described by a single chemical formula)
Mixture:
A substance that contains more than one pure substance
Pure Substances: Are made of only one compound or one element. Can be represented by one chemical Examples: formula. Salt NaCl Copper Cu Water H 2O
Mixture:Anything that contains more than one pure substance. Examples:
Juice, Granite, Salad Dressing, etc
Mixtures A combination of two or more pure substances
that are not chemically combined. substances held together by physical forces, not chemical No chemical change takes place Each item retains its properties in the mixture They can be separated physically
Chem4kids.com
Examples:
Atom, Element, Molecule, Compound:
Mixtures vs. Compounds
http://www.bbc.co.uk/schools/ks3bitesize/science/chemistry/elements_com_mix_6.shtml
Organic & Inorganic Compounds Organic compounds are extracted from living
organism(plants, animals etc) and inorganic compounds are extracted from non living things(rocks, in laboratory etc). These days organic compounds can be artificially created by human beings, and moreover organic compounds have been found in outer space where there are no living beings. But this the difference which is very basic,in terms of chemistry their are lot of differences between Organic and inorganic compounds,lets discuss about them in detail.
Organic & Inorganic CompoundsOrganic Compounds Biological in nature Extracted from living
Inorganic Compounds Mineral in nature Created either due to
things Organic compounds
have carbonhydrogen bonds Do not contain metal atoms.
natural processes or in the laboratory. Do not have carbon atoms. Contain metal atoms
What about us? What compounds are in Humans?The most important in carrying out life processes. They are the macromolecules Carbohydrates | Proteins | Nucleic Acids | Lipids
Can you identify the following?You will be shown a series of photos. Tell if each photo represents an item composed of an element, compound (organic or inorganic), or mixture. Review: An element contains just one type of atom. A compound contains two or more different atoms joined together. (organic: biological, inorganic: mineral) A mixture contains two or more different substances that are only physically joined together, not chemically.
Element, Compound, or Mixture? Rocks
Element, Compound, or Mixture? Rocks
Element, Compound, or Mixture? Copper
Element, Compound, or Mixture? Copper
Element, Compound, or Mixture? Jelly Beans
Element, Compound, or Mixture? Jelly Beans
Element, Compound, or Mixture? Table Sugar
Element, Compound, or Mixture? Table Sugar - Organic
Element, Compound, or Mixture? Diamond
Element, Compound, or Mixture? Diamond
Element, Compound, or Mixture? Tea
Element, Compound, or Mixture? Tea
Element, Compound, or Mixture? Salt
Element, Compound, or Mixture? Salt - Inorganic
Element, Compound, or Mixture? Neon Gas
Element, Compound, or Mixture? Neon Gas
Element, Compound, or Mixture? Salad
Element, Compound, or Mixture? Salad
Element, Compound, or Mixture? Pure Water
Element, Compound, or Mixture? Pure Water - Inorganic
Element, Compound, or Mixture? Aluminum
Element, Compound, or Mixture? Aluminum
Element, Compound, or Mixture? Lemonade
Element, Compound, or Mixture? Lemonade
Element, Compound, or Mixture? Silver
Element, Compound, or Mixture? Silver
Element, Compound, or Mixture? Sand
Element, Compound, or Mixture? Sand
A. Matter FlowchartMATTERyes MIXTURE yesIs the composition uniform? Can it be physically separated?
no
PURE SUBSTANCE no yesCan it be chemically decomposed?
no
Homogeneous Mixture (even mixture)
Heterogeneous MixtureUneven mixture
Compound
Element
Colloids
Suspensions
Notes Detailed notes are located at:
http://www.middleschoolscience.com/elementscompounds-mixtures-notes-isn.pdf Flow Chart:
http://www.middleschoolscience.com/matter-flowchart-isn.pdf