CH 1 & 2 09/14

Write -0.02051 in scientific notation.

Choose the proper unit of measurement:

The typical time between blinks is 6 _

• s

• g

• L

• mg

Osmium becomes super conducting at temperatures below 655. mK

Calculate the temperature at which osmium becomes superconducting in degrees Celsius.

• -273.15 C

• -272.495 C

• 0.655 C

• -272.5 C

• 0.3996

• 39.96

• 0.03996

• 399.6

• No

How many significant figures?

50,000.

• 143

• 2

• 1

• 5

• 6

• 1

• 3

• 2

What is the name of this element?

F

• There is no H...

• 4

• 2

• 1

• 20. 20. g

• 16.38 g

• 16.377 g

• 16. 16. g