Science - 2018-19

CH.2 d-e - Groups & Periods

The student will investigate and understand that the placement of elements on the periodic table is a function of their atomic structure. The periodic table is a tool used for the investigations of:
d) families or groups; and
e) periods

Bloom's Levels:  Analyze; Understand

Adopted: 2010

BIG IDEAS

  • The organization of the periodic table is based on properties of the elements.

  • I can explain why certain compounds form and others don't.

UNDERSTANDING THE STANDARD

  • The names of the groups on the periodic chart are alkali metals, alkaline earth metals, transition metals, halogens, and noble gases.
  • Metalloids have properties of metals and nonmetals. They are located between metals and nonmetals on the periodic table. Some are used in semiconductors.
  • Periods and groups are named by numbering columns and rows. Horizontal rows called periods have predictable properties based on an increasing number of electrons in the outer energy levels. Vertical columns called groups or families have similar properties because of their similar valence electron configurations.

ESSENTIALS

In order to meet this standard, it is expected that students will

d, e) distinguish between a group and a period.

        identify key groups, periods, and regions of elements on the periodic table.

KEY VOCABULARY

alkali metal, alkaline earth metal, electronegativity, group, halogen, inner transition metal, ion, ionization energy, metal, metalloid, noble gas, nometal, octet rule, period, periodic law, representative element, transition element, transition metal

Updated: Nov 19, 2017