recap types of particles
Download
Skip this Video
Download Presentation
Recap: Types of Particles

Loading in 2 Seconds...

play fullscreen
1 / 12

Recap: Types of Particles - PowerPoint PPT Presentation


  • 50 Views
  • Uploaded on

Recap: Types of Particles. An atom is a chemically indivisible particle of an element. An element contains atoms of only one type. (eg. H, O, C) A molecule of a substance consists of two or more atoms

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' Recap: Types of Particles' - verdad


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
recap types of particles
Recap: Types of Particles
  • An atom is a chemically indivisible particle of an element.
  • An element contains atoms of only one type.

(eg. H, O, C)

  • A molecule of a substance consists of two or more atoms
  • A compound is composed of more than one type of element joined by chemical bonds.
chemical symbols of the elements
Chemical symbols of the elements
  • One or two letters, the first is always uppercase and the second always lowercase.

C carbon

Ca calcium

P phosphorus

Fe iron -ferrum

Pb lead - plumbum

formula represents atoms present
Formula represents atoms present

Ammonia, NH3

Methane, CH4

Alcohol, CH3CH2OH

chemical equation represents a change of one substance to another
Chemical equation represents a change of one substance to another.

Methane + oxygen carbon dioxide + water

CH4 + 2 O2 CO2 + 2 H2O

states of matter
States of Matter
  • Different states of a substance are different physical ways of packing its component particles.
  • A physical change is associated with a change of state.
  • A chemical change involves changing one substance into another.
physical properties
Physical properties are the properties that a substance shows by itself, without changing or interacting with another substance

Colour

Melting point

Conductivity

Density

Surface tension

Physical Properties

Toby Hudson, (School of Chemistry, University of Sydney)

Toby Hudson, (School of Chemistry, University of Sydney)

1 L Br2

1 L Hg

chemical properties
Chemical properties are the properties of a substance that result in the formation of a new substance

Flammability

Corrosiveness

Reactivity with acid

Chemical Properties

commons.wikimedia.org/wiki/File:US_Navy_030328-M-0000X-005_Kuwaiti_firefighters_fight_to_secure_a_burning_oil_well_in_the_Rumaila_oilfields.jpg

http://www.plenrich.com/copper.htm

physical vs chemical
Physical changes occur when a substance alters its physical form but NOT its composition

– the compound doesn’t change

– chemical bonds don’t form or break

e.g.: boiling of water, freezing of wax

Chemical changes occur when a substance (or a number of substances) is converted into a new substances

– the compound/allotrope changes

– chemical bonds form or break

e.g.: burning of H2 with O2 to give H2O, reacting zinc in hydrochloric acid

Physical vs Chemical

Self test: http://www.edinformatics.com/math_science/a_p_chem.htm

properties of matter
Properties of Matter
  • An intensive property is independent of the amount of substance present. (e.g. pH)
  • An extensive property depends on how much of a substance you have got. (e.g. volume)
learning outcomes
Learning Outcomes:
  • By the end of this lecture, you should:
    • know how to write chemical symbols using the correct capitalisation
    • be able to work out which atoms are present in a compound from its formula
    • be able to describe the difference between a physical and a chemical property
    • be able to describe the difference between a physical and a chemical change
    • be able to describe the difference between an intensive and an extensive property
    • be able to complete the worksheet (if you haven’t already done so….)
questions to complete for the next lecture
Questions to complete for the next lecture:
  • Complete the figure below showing the transformations between physical states

condensation

liquid

gas

vapourisation

solid

questions to complete for the next lecture1
Questions to complete for the next lecture:
  • Label the following properties of matter as either intensive or extensive.
  • melting point
  • boiling point
  • mass
  • volume
  • density
  • concentration
ad