Physical Science Chapter 5

The elements in group 8A that are colorless, odorless, and unreactive.

• alkali metals

• alkaline earth metals

• halogens

• noble gases

Elements that form a bridge between the elements on the left and right sides of the table.

• metals

• nonmetals

• transition metals

• metalloids

an arrangement of elements in columns, based on a set of properties that repeat from row to row

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

1/12 the mass of a carbon-12 atom

elements that have characteristics like metals & nonmetals

electron that occupies the highest occupied energy level of an atom

Tags

NGSS.HS-PS1-1

group 1A or just group 1

Mendeleev organized his periodic table by:

• a. increasing atomic number

• a. increasing atomic mass

• a. decreasing atomic number

• a. decreasing atomic mass

1. Elements in a group have a similar:

• a. atomic mass

• a. atomic number

• a. electron configurations

• a. period

If the atomic mass of hydrogen is 1.008, how many protons does a hydrogen atom have?

• 1

• 2

• 3

• 4

• 0