Energy Forms/Transfers
Is chemical energy under the category of kinetic or potential energy?
Potential Energy
What do periods tell us?
the number of shells for an element
What are the group 7 elements called?
Halogens
What are you determine the number of protons?
the atomic number
What is the unit for potential and kinetic energy?
Joules (J)
Is thermal energy under the category of kinetic or potential energy?
Kinetic Energy
What is the maximum numbers of the first three shells?
2, 8, 18.
What are the group 2 metals called?
Alkaline Earth Metals
How many valence electrons does Lead (Pb) have?
Four (4)
What is the formula for force? (What two variables make up force?)
mass and acceleration
Thermal energy consists of what three types of transfers of heat?
What is the difference between an element and a compound?
Compounds are made up of elements
What group is the most reactive metals?
Group One; Alkali Metals
How do you find the amount of neutrons in an element?
Neutrons= Atomic Mass - Atomic Number
What is the formula for potential energy?
mass x gravity x height (gPE=mgh)
If 100J was made in the plant, but only 40J made it to the electrical lines then the other 60J was transferred out as what energy?
thermal energy
What is inside the nucleus?
protons and neutrons
What group is the least reactive group?
Group 8; Noble Gases
Name three properties of metals.
Lustrous, malleable, shiny, conductors, dense, ductile, bright light, some magnetic, usually solid at room temperature.
What is the formula for mechanical energy?
ME=KE+PE, kinetic and potential energy
Explain the energy transformations in an electric power plant. (5 Transformations)
Chemical to Thermal to Thermal to Mechanical to Electrical
Name 3 Metalloids
B, Si, Ge, As, Sb, Te.
What are the elements in the middle of the table called?
Transition Metals
Name three properties of metalloids.
Good semiconductors, shiny or dull, solid at room temperature, malleable/brittle, dim light.
What is the formula for kinetic energy?
KE=1/2mv^2; one half mass x velocity squared