Periodic Table Organization

Describe how the elements in the modern periodic table are deliberately arranged in strict order of their atomic (proton) number.

Explain that elements exhibiting similar chemical properties are placed into vertical columns, known as groups.

Understand that the periodic table is so named because elements with similar properties occur at regular, predictable intervals.

Explain that elements positioned in the same group inherently have the same number of electrons in their outer shell (outer electrons).

Understand how possessing the same number of outer electrons grants these elements similar chemical properties.

Explain how the specific physical position of an element in the periodic table is directly related to the arrangement of electrons in its atoms, and hence its atomic number.

Predict possible chemical reactions and the probable reactivity of elements by analyzing their specific positions within the periodic table.