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SUCCESS CRITERIA
SUCCESS CRITERIA
I can define atom.
I can state the locations of a proton, a neutron, and an electron in an atom.
I can state the relative charges of a proton, a neutron, and an electron.
I can state the approximate relative masses of a proton, a neutron, and an electron.
I can define proton (atomic) number.
I can define nucleon (mass) number.
I can determine the numbers of protons, neutrons, and electrons in atoms and ions.
I can describe the formation of ions from atoms of different elements.
I can interpret and write nuclide notation and other ways to represent an atom.
I can define isotopes.
I can write the electronic configuration and draw the electronic structure of atoms and ions of elements with proton numbers 1 to 20.
I can interpret an element’s period and group numbers.
KEY IDEAS
KEY IDEAS
An atom is the smallest particle of a chemical element.
All elements are made up of atoms.
All atoms are made up of sub-atomic particles.
Isotopes are atoms of the same element with same number of protons and electrons, but different number of neutrons.
Isotopes have the same chemical properties, but slightly different physical properties.
Periods are horizontal rows numbered from 1 to 7, while groups are vertical columns numbered from 1 to 18.
Period number of the element is the same as the number of occupied electron shells.
Group number of the element is the same as the number of valence electrons.
Elements in the same group have the same number of valence electrons and similar chemical properties.
How an atom of an element forms bonds or reacts with other atoms depends on its number of valence electrons.
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