Create an account
What determines the speed of atoms and molecules of a particular substance?
Size of the atoms and molecules, temperature of the substance
the kinetic theory states that the higher the temperature, the faster the ______.
particles that make up a substance move
According to the law of conservation of mass, ________
total mass stays the same in changes of state
According to the law of conservation of energy, _________
energy is not created or destroyed in changes of state
What happens to the particles of a substance when it condenses?
particles slow down and clump together
You have 85.5 g of flourine, which has a molar mass of 19 g/mol. How may moles of flourine do you have?
Decmocritus's original atomic theory was revised because it ________.
did not have a scientific basis
Whose model determined that an atom's positive charge is concentrated in the atom's center?
What is the amount of nickel, which has an average atomic mass of 58.7 u, present in 525 g nickel?
An iron atom has an atomic mass of 56. Its atomic number is 26. How many neutrons does the iron atom have?
Dalton's atomic theory stated that every element was made of atoms that could not be subdivided, atoms of the same element are alike, and ________.
atoms of different elements could form to join compounds
An element's average atomic mass is a ________ average, so ___________.
weighted, common isotopes have a greater effect than uncommon ones
You have 6.50 mol of chromium, which has a molar mass of 52 g/mol. What is the mass in grams of this amount of chromium?
The kinetic theory states that, at the same _______, heavier particles move more slowly than lighter particles.
The first person who suggested that matter was made up of atom was the Greek philosopher __________.
A region in which there is a high probability of finding an electron is called a(n) ________.
Thomson's cathode-ray tube experiment supported the theory that _______ exist inside an atom.
Rutherford's gold-foil experiment revealed that an atom's positive charge is concentrated in the atom's ________.
Main points of the kinetic theory of matter:
speeds depend on temperature and size, particles are always in motion
If you know element's molar mass, explain how you can determine that mass of a particular amount of the element.
multiply amount of element in moles by its molar mass
Please allow access to your computer’s microphone to use Voice Recording.
Having trouble? Click here for help.
We can’t access your microphone!
Click the icon above to update your browser permissions and try again
Reload the page to try again!Reload
Press Cmd-0 to reset your zoom
Press Ctrl-0 to reset your zoom
It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.
Please upgrade Flash or install Chrome
to use Voice Recording.
For more help, see our troubleshooting page.
Your microphone is muted
For help fixing this issue, see this FAQ.
Star this term
You can study starred terms together