Build an Atom

Use the PhET simulation to build an atom with the following components:

3 protons
4 neutrons
3 electrons

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Draw

Draw a picture of the atoms you created. Make the protons orange, neutrons gray, and electrons blue. Remember, the atom should have 3 protons, 4 neutrons, and 3 electrons.

Multiple Choice

The mass of this atom is

• 3 amu

• 4 amu

• 7 amu

• 11 amu

Multiple Choice

The charge of the atom is:

• 0, this is a neutral atom

• -3

• -1

• +1

Use the PhET simulation to build an atom with the same components as before:

3 protons
4 neutrons
3 electrons

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Labelling

Label the parts of an atom.

Drag labels to their correct position on the image

proton

neutron

electron

Dropdown

If you want to change the type of element your atom is, you need to ​add a​

Select answer

.

Dropdown

If you want to change the charge of your atom, you need to add a ​

Select answer

or an ​

Select answer

.

Dropdown

If you want to change the mass of your atom by 1 or more amu, you and either add a​

Select answer

or a​

Select answer

.

Multiple Choice

Which part of an atom determines the element?

• proton

• neutron

• electron