Lesson: Atomic Structure

Atomic Structure

By William Lovering

Multiple Choice

What is the charge of an electron?

• +1

• -1

• 0

• None of these

Fill in the Blank

What would be the overall charge of an atom with 4 protons, 4 neutrons, and 4 electrons?

Fill in the Blank

What would be the overall charge of an atom with 5 protons, 6 neutrons, and 4 electrons?

Fill in the Blank

What would be the overall charge of an atom with 6 protons, 4 neutrons, and 8 electrons?

Fill in the Blank

What is the mass of an atom with 8 protons, 8 neutrons, and 8 electrons.

Fill in the Blank

How many neutrons are in an atom with 12 protons and a mass of 22 amu?

Fill in the Blank

What subatomic particle has charge but almost no mass?

Fill in the Blank

What subatomic particle has mass but no charge?

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

Fill in the Blank

______ atoms are almost always radioactive and unstable. (Large/Small)

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