Average Atomic Mass Review

Calculate the average atomic mass of silver.

• 106.38649amu
• 111.91896amu
• 107.8677amu
• 121

Tags

NGSS.HS-PS1-7

An element has two naturally occurring isotopes. One is 10.013 amu and is 19.9% abundant. The other is 11.01 amu and is 80.1% abundant. What is the average atomic mass? What element is it?

• 9.012, Beryllium
• 12.011, Carbon
• 6.941, Lithium
• 10.812, Boron

Oxygen has 8 protons. What is oxygen's atomic number?

• 16
• 8
• 15.999
• 0

Tags

NGSS.MS-PS1-1

A neutral atom of Carbon-13 has ________ electrons and _________ neutrons

• 13, 13
• 6, 7
• 7, 7
• 6, 6

Tags

NGSS.MS-PS1-1

Protons have a mass of _____ amu Neutrons have a mass of _____ amu.

• 1, 2

• 1, 1

• 1, 0

• 0,1

The average atomic mass on the periodic table is found from...

• calculating the weighted average mass of all the isotopes of that element

• Calculating different types of elements together

• calculations the average of all elements in that period together.

• making a guess about how much all the isotopes might wiegh together.

An element has 8 protons, 6 neutrons and 8 electrons- what element is it and what is its mass.

• carbon, 14 amu

• silicon, 16 amu

• Oxygen, 16 amu

• Oxygen, 14 amu

Tags

NGSS.MS-PS1-1

An element has 7 protons, 10 neutrons and 6 electrons what element is it and what is its mass?

• Carbon, 17 amu

• Neon, 13 amu

• Nitrogen, 17 amu

• Nitrogen, 13 amu

Tags

NGSS.MS-PS1-1

4.35% of all X atoms have a mass of 39.946 amu. 83.79% have a mass of 41.941 amu, 9.50% have a mass of 42.941 amu, and 2.36% have a mass of 43.939 amu. What is the average atomic mass of atom X?

• 41.97 amu
• 42.19 amu
• 10.43 amu
• 40.04 amu

Compute the average atomic mass for silicon:

• 27.977
• 28.09
• 28.976
• The average mass cannot be determined from provided information.