C4.8A Identify the location, relative mass, and charge for electrons, protons, and neutrons.
· C4.8B Describe the atom as mostly empty space with an extremely small, dense nucleus consisting of the protons and neutrons and an electron cloud surrounding the nucleus.
· C4.8C Recognize that protons repel each other and that a strong force needs to be present to keep the nucleus intact.
· C4.9b Identify metals, non-metals, and metalloids in the periodic table.
· C4.9A Describe physical and chemical properties of major sections/ groups.
· why are elements in the same groups have similar chemical properties?
· C4.9c Predict general trends in atomic radius within a group and a period.
