Atomic Structure III

Review Questions

Match

Match the following

Dalton

Thompson

Rutherford

Bohr

Current model

• Dalton

• Thompson

• Rutherford

• Bohr

• Current model

Labelling

Correctly label image

Drag labels to their correct position on the image

Element symbol

Atomic number

Atomic mass

Draw

Draw the lewis-dot structure for Arsenic.

Multiple Choice

Which of the following best describes isotopes?

• Atoms of the same element with different numbers of neutrons

• Atoms with different numbers of protons and electrons

• Atoms of different elements with the same mass number

Dropdown

Aluminum- 24 and Aluminum- 21 differ in their ​number of

Select answer

and ​ ​

Select answer

​

Open Ended

Why do you think that isotopes react the same chemically?

Open Ended

Explain why heavier elements require more neutrons than protons for nuclear stability.

Multiple Choice

To calculate average atomic mass, you need

• the percent abundance of each isotope

• the atomic mass and percent abundance of each isotope

• to find the average of the atomic masses of each isotope

Multiple Choice

An isotope has three forms.  30% have a mass of 4 amu, 20% have a mass of 5 amu and 50% have a mass of 3 amu.  Average atomic mass will be closest to

• 2 amu
• 3 amu
• 4 amu
• 5 amu

Multiple Choice

Compute the average atomic mass for silicon:

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

Multiple Choice

What is the average atomic mass for copper?

• 64.31

• 65.33

• 127.86

• 63.55

• 100.00