Structure Of Matter Flashcards
Be able to describe the Electron Cloud Model of an atom.
The nucleus is in the center and the electrons travel randomly around the nucleus
What parts can be found in an atom?
Protons
Neutrons
Electrons
Why does an atom have a neutral charge?
The Proton is positive, the electron is negative, therefore the charges cancel each other out.
Define Element.
It is a substance that is made up of 1 type of atom.
Identify some elements.
Hydrogen, Carbon, Gold, Sulfur
Define Atom?
Is the basic building block of all matter.
How many elements occur naturally on earth?
92
Be able to identify parts of the element by using a Periodic Table (see magenta note on the Periodic Table) i.e. Element symbol, atomic number, atomic mass, number of protons, number of electrons and number of neutrons.
Atomic Number = number of protons and the number of neutrons
Point out the Element Symbol
Point out the atomic mass
Atomic mass (24) - Atomic Number (12) = number of neutrons (12)
Be able to use the Periodic Table:
Identify which elements are metals?
Identify which elements are non metals?
Identify which elements are solid, liquid or gas?
Identify which elements occur naturally or are man made?
Metals - Blue on the Periodic Table
Non Metals - Pink on the Periodic Table
Solid, liquid or gas - Note the symbol next to the element symbol
Identify the characteristics of metals, nonmetallic and metalloids?
Look over the handout
Define molecule?
When 2 or more atoms join together - atoms can be the same or different.
Define compound?
Substances made up of 2 or more unlike elements.
How are molecules and compounds different?
Molecules can be made up of 2 or more identical atoms or 2 or more different atoms.
Compounds are made of 2 or more different elements.
Who is Dymitry Mendeleyev?
He is the scientist who first organized the elements into a chart.
Why is the Periodic Table important?
It shows the order between elements.