Atoms Flashcards
What are all substances made from
Atoms
What are elements made from
Atoms
How are compounds formed
Out of elements in a chemical reaction
What does the nucleus contain
Protons and neutrons
What charge does the nucleus have
Positive because of protons
What charge does the electron have
Negative
What’s the radius of an atom
0.1 nanometers
What charge does a neutron have and why
Neutral because they have the same number of protons as electrons
What’s an ion
An atom that has lost or gained electrons
What does a nuclear symbol tell you
Tells you it’s atomic number and mass number
What’s the atomic number
Protons
What does the mass number tell you
Total number of protons and neutrons in the atom
How do you get the number of neutrons
Subtract the atomic number from the mass number
Atomic number
Bottom
Mass number
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