You can click on this periodic table at any point if you need it.
Atoms are made of 3 types of subatomic particles Protons, Neutrons, and Electrons
Starting with the proton, click on the particels one at a time to learn about them. Once you have learned about them all, take a screenshot of this page and turn it in.
NF
EF
PF
Protons have a positive charge and determine the element
Neutrons have no charge and deterine the isotope
Electrons have a negative charge and determine the charge / ion
Protons
Protons are positively charged and found in the nucleus of the atom. Each element has a different number of protons, and the numebr of protons is called the atomic number. This means that we can tell which element an atom is by just counting the number of protons or knowing the atomic number.
Protons
Click on the correct answer to move on, or click the proton in the top right to go back and reread the information:
Of the atoms below, which one is not a hydrogen atom?
Protons
Click on the correct answer to move on, or click the proton in the top right to go back and reread the information:
Of the atoms below, which one is not a hydrogen atom?
WRONG
Click here to try again
Atomic Number
For each atom below, drag the correct atomic number onto the atom. When you get it right, the way forward will appear.
Congrations!
You're done the proton section! Click the button to go back to the main menu and work on the next section.
PF
Neutrons
Neutrons are uncharged (neutral) particles found in the nucleus of the atom. Most elements can have different numbers of neutrons in different atoms of that element. For instance, different atoms of hydrogen can either have 0, 1 or 2 neutrons per atom. We call these versions of an atom that have different numbers of neutrons isotopes.
Neutrons
Click on the correct answer to move on, or click the neutron in the top right to go back and reread the information:
What charge does a neutron have?
Positive Charge
Negative Charge
No Charge
It varies between atom
WRONG
Click here to try again
Atomic Weight
Neutrons and Protons weigh about the same amount (and electrons weigh almost nothing), so the weight of an atom (the mass number) is equal to the numebr of Protons and Neutrons it has..
Click on the atom with a mass numebr of 2 to move on:
Isotopes
Since the number of protons is the atomic number, Mass Number - Atomic Number = the number of neutrons. The different versions of an atom that are the same element, but have different numbers of neutrons are called isotopes. Isotopes are named based on their mass number, so Hydrogen-2 has a mass of 2 amu (atomic mass units)
Isotopes
Isotopes can also be written in the following way:
Atomic Number
For each atom below, drag the correct atomic number onto the atom. When you get it right, the way forward will appear.
He
Li
Congrations!
You're done the Neutron section! Click the button to go back to the main menu and work on the next section.
NF
Electrons
Electrons are the smallest particles that make up an atom. They weigh almost nothing. Electrons are found in the electron cloud around the outer protion of the atom, and they are constantly moving around. Because of this, electrons can be removed or added to an atom really easily.
Electrons
The image below shows a quantum model of the atom. Click on the part of the image were the electrons would be found to move on.
WRONG
Click here to try again
Charge
Electrons have a negative charge that is the same strength as the positive charge of a proton. Because of this, for an atom to have a neutral charge, the atom has to have the same number of electrons as it has protons (which is the same as the atomic number).
To move on, click on the number of electrons that a Carbon atom with a neutral charge would have:
Ions
Ions that are not neutral (that have either a positive or negative charge) are called ions. Cations have a positive charge, and Anions have a negative charge We can write cations and anions by adding a plus or minus to the atomic symbol: Or adding the number and the plus or minus if the charge is more than one:
H+
Li2+
Ions Sorting
Sort the atoms and symbols by whether they are neutral, cations, or anions:
Cation
Neutral
Anion
H-
O+
16
Congrations!
You're done the Electron section! Click the button to go back to the main menu and work on the next section.
Atoms, Isotopes, and Ions
Elizabeth Foster
Created on October 16, 2025
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Transcript
PF
NF
Atoms, Isotopes, and Ions
EF
A Quick Introduction from Your Tired Teacher
Start
You can click on this periodic table at any point if you need it.
Atoms are made of 3 types of subatomic particles Protons, Neutrons, and Electrons
Starting with the proton, click on the particels one at a time to learn about them. Once you have learned about them all, take a screenshot of this page and turn it in.
NF
EF
PF
Protons have a positive charge and determine the element
Neutrons have no charge and deterine the isotope
Electrons have a negative charge and determine the charge / ion
Protons
Protons are positively charged and found in the nucleus of the atom. Each element has a different number of protons, and the numebr of protons is called the atomic number. This means that we can tell which element an atom is by just counting the number of protons or knowing the atomic number.
Protons
Click on the correct answer to move on, or click the proton in the top right to go back and reread the information:
Of the atoms below, which one is not a hydrogen atom?
Protons
Click on the correct answer to move on, or click the proton in the top right to go back and reread the information:
Of the atoms below, which one is not a hydrogen atom?
WRONG
Click here to try again
Atomic Number
For each atom below, drag the correct atomic number onto the atom. When you get it right, the way forward will appear.
Congrations!
You're done the proton section! Click the button to go back to the main menu and work on the next section.
PF
Neutrons
Neutrons are uncharged (neutral) particles found in the nucleus of the atom. Most elements can have different numbers of neutrons in different atoms of that element. For instance, different atoms of hydrogen can either have 0, 1 or 2 neutrons per atom. We call these versions of an atom that have different numbers of neutrons isotopes.
Neutrons
Click on the correct answer to move on, or click the neutron in the top right to go back and reread the information:
What charge does a neutron have?
Positive Charge
Negative Charge
No Charge
It varies between atom
WRONG
Click here to try again
Atomic Weight
Neutrons and Protons weigh about the same amount (and electrons weigh almost nothing), so the weight of an atom (the mass number) is equal to the numebr of Protons and Neutrons it has..
Click on the atom with a mass numebr of 2 to move on:
Isotopes
Since the number of protons is the atomic number, Mass Number - Atomic Number = the number of neutrons. The different versions of an atom that are the same element, but have different numbers of neutrons are called isotopes. Isotopes are named based on their mass number, so Hydrogen-2 has a mass of 2 amu (atomic mass units)
Isotopes
Isotopes can also be written in the following way:
Atomic Number
For each atom below, drag the correct atomic number onto the atom. When you get it right, the way forward will appear.
He
Li
Congrations!
You're done the Neutron section! Click the button to go back to the main menu and work on the next section.
NF
Electrons
Electrons are the smallest particles that make up an atom. They weigh almost nothing. Electrons are found in the electron cloud around the outer protion of the atom, and they are constantly moving around. Because of this, electrons can be removed or added to an atom really easily.
Electrons
The image below shows a quantum model of the atom. Click on the part of the image were the electrons would be found to move on.
WRONG
Click here to try again
Charge
Electrons have a negative charge that is the same strength as the positive charge of a proton. Because of this, for an atom to have a neutral charge, the atom has to have the same number of electrons as it has protons (which is the same as the atomic number).
To move on, click on the number of electrons that a Carbon atom with a neutral charge would have:
Ions
Ions that are not neutral (that have either a positive or negative charge) are called ions. Cations have a positive charge, and Anions have a negative charge We can write cations and anions by adding a plus or minus to the atomic symbol: Or adding the number and the plus or minus if the charge is more than one:
H+
Li2+
Ions Sorting
Sort the atoms and symbols by whether they are neutral, cations, or anions:
Cation
Neutral
Anion
H-
O+
16
Congrations!
You're done the Electron section! Click the button to go back to the main menu and work on the next section.
EF