1.As with any grid, the periodic table has (left to right) and (up and down). 2.Every row is called a .
3.All the elements in the same period have the same number of .
Each column is called a .
4.The elements in each group have the number of electrons in the outer orbital (or valence electrons).
5.Noble gases and helium are considered “happy” because their shell is .

this was not a multiple-choice its about the periodic table

In november 1987, a massive iceberg broke loose from the antartic ice mass and floated free in the ocean. the chunk of ice was estimated to be 98 mi long, 25 mi wide, and 750 ft thick. a typical backyard swimming pool contains about 24,000 gallons of water. how many of these pools could you fill from the water in this iceberg? (assume the iceberg is a rectangular solid of the above dimensions and consists of water only). express answer in scientific notation.