Honors Chemistry Midterm

How many significant figures: 216 m

• 1
• 2
• 3
• 0

How many significant figures: 0.001 g

• 4
• 3
• 2
• 1

Give the answer to the correct number of significant figures to

3.419 + 3.912 + 7.0518 + 0.00013

• 14.383

• 14.382

• 14.3829

• 14.38293

Round 0.010229 to four sig figs

• 1022
• 1023
• 0.01023
• 0.01022

The SI unit for temperature is __?__.

• degree fahrenheit  (° F)
• degree celsius  (° C)
• kelvin  (K)
• degree centigrade  (°C)

35,400 mg = ________g

• 3.5400 g

• 3,540 g

• 35.4 g

• 354,000 g

The atomic mass on the periodic table is an average of all the ____ of an element based on abundance.

• protons
• isotopes
• ions
• charges

A neutral atom of the element sodium has 11 protons and ____ electrons.

• 22
• 23
• 8
• 11

Do the following atoms belong to the same element? Explain
       Aluminum-27
       An atom with 14 protons and 13 neutrons

• Yes because they have the same number of protons
• Yes because they have the same mass
• No because they have different number of protons
• No because they have different number of neutrons

Tags

NGSS.HS-PS1-7

What is the atomic number of this atom?

• 4
• 5
• 9
• none of the above

Tags

NGSS.HS-PS1-1