States of Matter/Chemical and Physical Changes
_________ must be _________ (added/removed) to convert a substance from a solid to a liquid.
What is heat/added?
Iron filings
What is an element?
The scientist who used cathode ray tubes to discover the electron
Who is JJ Thomson?
The atomic number of Nickel
What is 28?
This radioactive particle is most similar to a helium atom
What is an alpha particle?
________ possess more energy of motion than liquids.
What are gasses?
Water
What is a compound?
The scientist who conducted the famous gold foil experiment to discover the nucleus
Who is Ernest Rutherford?
The number of protons in the following:
2512Mg2+What is 12?
This radioactive particle is made of just energy and causes no change in mass to nuclei when emitted
What are gamma rays?
Sodium bicarbonate is mixed with hydrochloric acid, and CO2 gas is produced and released as fizzing. This is a ___________________ change.
What is a chemical change?
What is a homogeneous mixture?
The scientist who discovered the charge on the electron
Who is Robert Millikan?
The number of neutrons in the following:
5224Cr3+
What is 28?
Complete the following nuclear equation:
22688Ra -----> alpha particle + ?
What is:
22688Ra -----> alpha particle + 22286Rn ?
Potassium iodide and lead nitrate (both colorless liquids) are mixed, resulting in the formation of lead iodide, a yellow solid. This is a ___________________ change.
What is a chemical change?
Air
What is a homogeneous mixture?
The scientist who came up with the Law of Definite Proportions
Who is Joseph Proust?
The number of protons in Ag-108
What is 47?
Complete the following nuclear equation:
6027Co -----> beta particle + ?
What is:
6027Co -----> beta particle + 6028Ni
Green food dye is added to water, and the water turns green. This is a ____________________ change.
What is a physical change?
Blood that has been sitting in a tube for 3 days
What is a heterogeneous mixture?
The scientist who proposed that electrons belong in specific orbitals around the nucleus of an atom
Who is Niels Bohr?
The number of electrons in the following:
8035Br1-
What is 36?
Complete the following nuclear equation:
? -----> beta particle + 21483Bi
What is:
21482Pb -----> beta particle + 21483Bi