5.1 matter and atoms
DESCRIPTION
5.1 Matter and Atoms. Matter and Atoms. What is matter? Anything w/mass and volume. Volume is the space that an object takes up. Mass: is the material an object is made of. (essentially everything) Composed of elements. Matter and Atoms. What is an element? - PowerPoint PPT PresentationTRANSCRIPT
MATTER AND ATOMS
What is matter? Anything w/mass and volume.
Volume is the space that an object takes up.
Mass: is the material an object is made of. (essentially everything) Composed of elements
MATTER AND ATOMS
What is an element?Substance that cannot be broken
down into simpler substance.ex. Gold is only gold atoms or silver is only silver atoms…
STRUCTURE OF THE ATOM
The atom are composed into three sections:
Nucleus (center of the atom) – made up of protons (positive charge)and neutrons (no charge)
Electrons (in the outer shells)- have a negative charge.
STRUCTURE OF THE ATOM
Atomic Number – The number of protons in an atom. Equal to the number of e-.
The atomic mass – the avg. of an elements isotopes.
Isotopes – When an element has a different # of neutrons than another atom of the same element.
Mass Number – The sum of the protons and neutrons
BONDING OF ATOMS
Ionic Bonds – Bonds where electrons are lost or gained to another atom. Usually b/t metal and nonmetal.
COMPOUNDS AND MIXTURES
Compounds don’t have the same properties as their base components.
Ex. Na and Cl are poisonous, but together they form table salt.
COMPOUNDS AND MIXTURES
Mixtures are not the same as a compound. Mixtures can be separated by physical means.