Work & Simple Machines
Atoms
Periodic Table
Metals, Nonmetals, Mettaloids
Bonding
200
A force exerted over a distance to move an object is
Work
200
Who came up with the idea for dividing an object until you can't divide it anymore
Deomcritus
200
Rows are called
periods
200
This group is the most reactive group
Alkali Metals
200
When each atom shares one electron with another is called
Single Covalent bond
400
The mechanical advantage of a machine is the number of times it
multiplies the input force
MA = OF/IF
400
These are the positively charged particles in an atom
Protons
400
Name 3 Halogens
Flourine, Chlorine, Bromine, Iodine, Astitine
400
Define thermal conductivity
Ability of an object to transfer heat energy
400
When a metal and a nonmetal bond, the bond is called
Ionic
600
What is the IMA of a ramp that is 1.6m long and 1/2m tall?
3.2MA
600
This man discovered the proton
Rutherford
600
Which family or group is 'tin' in?
Carbon Family
600
As you go down a group, what happens to atomic radius?
Gets larger
600
This group never bonds.. and why?
Noble Gases & they have full valence shells
800
What are three ways machines make work easier
Distance, direction, force
800
This model of an atom aids us in seeing why things are reactive because of their layers and the outer electrons
Bohr Model
800
As you go to the right in the periodic table, elements get...
Heavier and less reactive
800
This is when two of the same atoms bonded together
diatomic molecule
800
In order to have a stable arrangement of 8 valence electrons, metal atoms are likely to ________ electrons
lose
1000
What is the equation for efficiency?
Output work / input work
1000
Draw a Lewis Dot Diagram of Silicon
1000
As you go down in groups of the periodic table, elements get
They get more reactive
1000
Silicon and germanium are metalloids often used to make
Semiconductors
1000
Draw a lewis dot diagram for this...
NaOH – Sodium hydroxide
Mr. Willey, write the answer on the board!