Element, Compound, or Mixture?
Iron filings
What is an element?
_________ must be _________ (added/removed) to convert a substance from a solid to a liquid.
What is heat/added?
The scientist who used cathode ray tubes to discover the electron
Who is JJ Thomson?
The atomic number of Nickel
What is 28?
104 x 82 (to the appropriate number of sig figs)
What is 8500 (or 8.5 x 103)?
Water
What is a compound?
Water is __________________ dense as a solid than as a liquid.
What is less?
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?
(4.53 x 105) x (8.16 x 10-9)
What is 3.70 x 10-3?
Table salt mixed with water
What is a homogeneous mixture?
Green food dye is added to water, and the water turns green. This is a ____________________ change.
What is a physical change?
The scientist who discovered the charge on the electron
Who is Robert Millikan?
The number of neutrons in the following:
5224Cr3+
What is 28?
275 kg = ______________ mg
What is 275,000,000 mg (or 2.75 x 108 mg)?
Air
What is a homogeneous mixture?
Mass is a(n) ________________________ property.
What is an extensive property?
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?
398 µg = ______________ kg
Blood that has been sitting in a tube for 3 days
What is a heterogeneous mixture?
Boiling point is a(n) __________________________ property.
What is an intensive property?
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?
Jackson, Pierre, and Lily each measured the density of aluminum (2.70 g/cm3) by volume displacement. They obtained the following results:
Jackson = 1.82 g/cm3
Pierre = 1.85 g/cm3
Lily = 1.78 g/cm3
Their data is __________________ and ___________________.
What is precise and inaccurate?