Midterm Exam Review

Which of the following is a substance?

• salt water

• salt

• sugar water

• iron and sand

Which of the following is a physical property?

• flammable

• rusting

• solubility

• reacting with acid

Which is a chemical way to separate?

• decomposition

• filtering

• dissoiation

• magnet

Is the student accurate or precise when he got 3.2 g and 3.1 g, when the correct answer is 3.9 g?

• accurate

• precise

• both

• neither

Which is the smallest unit?

• mL

• kL

• dL

• cL

How many significant digits does the followig have? 0.01005

• 4

• 5

• 6

• 2

Do the following conversion: 0.015 km = ____ m

• 0.000015 m

• .15 m

• 15 m

• 0.0015 m

Who discovered the electrons?

• Thomson

• Rutherford

• Millikan

• Chadwick

When you change the protons, you get a(n)

• new element

• ion

• isotope

• stays the same

What does the 13 stand for in carbon-13?

• average atomic mass

• mass number

• atomic mass

• protons