Midterm Exam Review #2

Dirty water is an example of a

• heterogeneous mixture

• solution

• substance

• element

Which of the following is a chemical property

• red color

• dissolves in water

• can be ignited

• magentic

A student collected the following data: 15.1 g, 15.3 g, and 14.9 g. The correct value was 15.1 g. His results were

• accurate and precise

• accurate

• precise

• neither accurate nor precise

Which is the largest number?

• 14 dg

• 14 mg

• 14 ng

• 3110

• 0.0311

• 0.00311

• 311

How many significant figures does the following number have: 1200

• 1

• 2

• 3

• 4

15.11 + 3.2 = in proper sig figs

• 18.31

• 18.3

• 18

• 18.310

When you lose an electron, you get a(n)

• anion

• cation

• isotope

• new element

What is the charge: 12 protons, 13 neutrons, 14 electrons

• 1+

• 2+

• 1-

• 2-

What particle has no charge and no mass

• alpha

• beta

• gamma

• positron