Lesson: Atomic Structure

Atomic Structure

By William Lovering

Multiple Choice

What is the charge of an electron?

• +1

• -1

• 0

• None of these

Multiple Select

In an atom, the combination of these two particles determine if it is radioactive

• protons

• neutrons

• electrons

• fermions

Multiple Choice

These forces fight against the stability of an atomic nucleus, causing some to decay.

• gravity

• electrostatic

• momentum

• strong

Multiple Choice

This force makes an atom more stable by holding the nucleus together.

• gravity

• electrostatic

• strong

• momentum

Multiple Choice

After Rutherford, chemists began identifying atoms by the positive charge in their nucleus. This was called the atomic number and represented the number of

• protons

• neutrons

• protons + neutrons

• protons + electrons

Multiple Choice

If atoms of an element were represented in this form, what information would the "X" give you?

• The element

• The number of protons

• The number of electrons and protons combined

• The number of neutrons and protons combined.

• The overall charge of the protons and electrons combined

Multiple Choice

If atoms of an element were represented in this form, what information would the red box give you?

• The element

• The number of protons

• The number of electrons and protons combined

• The number of neutrons and protons combined.

• The overall charge of the protons and electrons combined

Multiple Choice

If atoms of an element were represented in this form, what information would the green box give you?

• The element

• The number of protons

• The number of electrons and protons combined

• The number of neutrons and protons combined.

• The overall charge of the protons and electrons combined

Multiple Choice

If atoms of an element were represented in this form, what information would the blue box give you?

• The element

• The number of protons

• The number of electrons and protons combined

• The number of neutrons and protons combined.

• The overall charge of the protons and electrons combined

Multiple Choice

What is an isotope?

• 2 atoms of the same element with different mass

• 2 different elements that have atoms with the same mass

• 2 atoms of the same element with a different charge

• 2 atoms of the same element with different atomic number

Multiple Select

Mark all of the ways atomic structure could change to produce a different isotope of the same element.

• the number of protons change

• the number of neutrons change

• the number of electrons change

Multiple Choice

Most atoms have many stable isotopes.

• True

• False

Multiple Choice

Different isotopes of an element are identified by

• atomic number

• atomic mass

• atomic charge

• atomic symbol

Multiple Choice

An element's atomic weight is...

• the number of protons and neutrons in a single atom

• the weighted average of the mass of all known isotopes

• the average number of protons in the nucleus

• the total mass of protons, neutrons, and electrons

Multiple Choice

What do the numbers that are different in these 3 examples represent?

• Atomic Number

• Atomic Mass

• Atomic Weight

• Atomic Charge

Multiple Choice

What piece of information is missing that would allow you to calculate the atomic weight of these 3 isotopes?

• the percent of hydrogen atoms that match each isotope

• whether or not each isotope is stable

• which number is closest to the actual mass

• whether it has the same number of protons and neutrons

Multiple Select

Which isotope(s) of argon are most likely to be radioactive?

• Ar-36

• Ar-37

• Ar-38

• Ar-40