AGHS - Chem - Build an Atom - Matthew Neff | Library

Build an Atom! (PhET simulation)

Open this link in a new tab: https://phet.colorado.edu/sims/html/build-an-atom/latest/build-an-atom_en.html
Select the "Atom" option.
You are presented with a blank Bohr model of the atom. While we know this isn't accurate it is still a good and simple model for us to work with.
To the right of "Net Charge" and "Mass Number" in yellow boxes on the right, click the green "+" button to show their windows.
As you drag protons into the nucleus, notice the relationship between the number of protons and the element that is highlighted on the periodic table on the right.

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Does the highlighted element change when you add or remove protons to the nucleus?

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Try adding and removing electrons to the outer rings. Does the highlighted element change when you add or remove electrons?

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Try adding and removing neutrons to the nucleus. Does the highlighted element change when you add or remove neutrons?

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As you add protons, what happens to the charge (in the "net charge" window on the right)?

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As you add protons, what happens to the mass number?

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Now add electrons to the outer rings until you have the same number as protons. What happened to the charge?

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As you add electrons to the outer rings, what happens to the mass number?

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Now add more electrons than you have protons. What happened to the charge?

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Add neutrons to the nucleus. Does the charge change?

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As you add neutrons, does the mass change?

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AGHS - Chem - Build an Atom

AGHS - Chem - Build an Atom

Build an Atom! (PhET simulation)

Does the highlighted element change when you add or remove protons to the nucleus?

Try adding and removing electrons to the outer rings. Does the highlighted element change when you add or remove electrons?

Try adding and removing neutrons to the nucleus. Does the highlighted element change when you add or remove neutrons?

As you add protons, what happens to the charge (in the "net charge" window on the right)?

As you add protons, what happens to the mass number?

Now add electrons to the outer rings until you have the same number as protons. What happened to the charge?

As you add electrons to the outer rings, what happens to the mass number?

Now add more electrons than you have protons. What happened to the charge?

Add neutrons to the nucleus. Does the charge change?

As you add neutrons, does the mass change?

As you add protons and neutrons, does the mass change more, less or the same when adding a proton or adding a neutron?

Build an Atom! (PhET simulation)

Does the highlighted element change when you add or remove protons to the nucleus?

Try adding and removing electrons to the outer rings. Does the highlighted element change when you add or remove electrons?

Try adding and removing neutrons to the nucleus. Does the highlighted element change when you add or remove neutrons?

As you add protons, what happens to the charge (in the "net charge" window on the right)?

As you add protons, what happens to the mass number?

Now add electrons to the outer rings until you have the same number as protons. What happened to the charge?

As you add electrons to the outer rings, what happens to the mass number?

Now add more electrons than you have protons. What happened to the charge?

Add neutrons to the nucleus. Does the charge change?

As you add neutrons, does the mass change?

As you add protons and neutrons, does the mass change more, less or the same when adding a proton or adding a neutron?