Periodic Table
How many elements are on the periodic table?
118
uncuttable
What are the units for volume (liquid and solid)?
mL and cm3
How many subatomic particles are there?
3
What does KMT stand for?
Which element has 84 protons?
Polonium
Who is credited with discovering the nucleus?
Rutherford
What is the formula for finding DENSITY?
Which two subatomic particles have charges?
protons and electrons
Particles are constantly ______________.
Moving/colliding
How many neutrons does an atom of Arsenic have?
42
Who is credited with discovering the atom?
Dalton
What is the formula for finding Mass?
M = DxV
Which two subatomic particles have mass?
protons and neutrons
In which state of matter do particles take up the most space?
Gas
Which element has 30 electrons?
Zinc
Who is credited with discovering the electron?
Thomson
What are the units for Density?
g/cm3
g/mL
Describe where each subatomic particle is found.
protons - nucleus
neutrons - nucleus
electrons - surrounding nucleus (energy shells)
What is it called when a gas turns to a liquid?
Condensation
Name the element in Group 1, Period 4.
Potassium
Who is credited with discovering energy levels?
Bohr
Give an example of something that floats on water and an estimate of its density?
wood -> 0.9g/cm3
How do you know how many neutrons are there in an atom?
neutrons = atomic mass subtract the atomic number
What is the freezing/melting point of water?
0 degreesC