Atomic Structure

DIRECTIONS: Drag a proton into the atom model (x with two dashed circles around it). Click on "Net Charge" to see if what you have made has a charge or not. Next, click on "Mass Number" to find out the atom's atomic mass.

QUESTION: What happens when you drop the proton into the model?

DIRECTIONS: Add an electron to your atom of hydrogen.

QUESTION: What happens to the atom? Select all that apply.

DIRECTIONS: Add a neutron to your model from the previous question.

QUESTION: What happens to the element when you add a neutron?

DIRECTIONS: Add another proton to your model and check what happens.

QUESTION: Which of the following best describes what changes?

QUESTION: Based on your observations so far, which subatomic particle determines what element an atom is (its name)?

Neutral atoms have...

What particles affect the mass of the atom? (Select all that apply)