midterm review chemistry

The length of a ruler is an ___ property; the desnity of the ruler is an ___ property

• Intensive; intensive

• Intensive; extensive

• Extensive; intensive

• Extensive; extensive

Which of the following can be used to separate a compound into its component elements?

• Melting

• Centrifugation

• Distillation

• High electrical current

Determining the amount of energy found in a rice krispies treat would be an example of...

• Inorganic chemistry

• Pure chemistry

• Analytical chemistry

• Physical chemistry

Which of the following is NOT a sign of a chemical reaction?

• A substance freezes

• Light is produced

• A substance changes color

• A gas is produced without boiling

Which of the following is the smallest unit out of the ones listed?

• Kilogram

• Gram

• Milligram

• Microgram

How many significant figures are in 1001.0

• 2

• 3

• 4

• 5

How many significant figures are in 0.0010

• 2

• 3

• 4

• 5

An atom with mass 34 and 12 protons has...

• 12 neutrons

• 34 neutrons

• 22 neutrons

• 46 neutrons

Calcium (Ca) has atomic number 20. A Ca²⁺ ion therefore has...

• 20 electrons

• 22 electrons

• 18 electrons

• 2 electrons

Elements to the ___ of the periodic table are the largest

• Top right

• Top left

• Bottom right

• Bottom left