Today students reviewed atoms. Atoms, or elements, are the smallest unit of matter. They retain their identity in chemical reactions and are combined to form compounds and everything in the universe.
Atoms have some basic parts. Protons and Neutrons are found in the nucleus and make up the atomic mass. To find the number of neutrons, you subtract the atomic number (number of protons) from the atomic mass number (protons plus neutrons).
Electrons are so tiny that they do not influence the atomic mass. They are found orbiting the nucleus in shells or orbitals. Atoms are neutral so the number of protons equals the number of electrons.
Student reviewed how to determine this information from the periodic table. Then they got a mystery sample of Beanium. They had to count different colors of beans representing subatomic particles and determine which element they had.
Students finished class working on assignments that are due later in the week.
Tonight's homework is to finish an atom reading. Physical/Chemical lab is due Friday.
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