Among the elements of the main group, the first ionization energy increases from left to right across a period.
from right to left across a period.
when the atomic radius increases.
down a group.

George is a dalmatian puppy. describe what happens to light that allows you to see george’s black and white coat.

Which of the following units is not an official si unit

Why does earth rotate? because earth is formed from cold gases collapsing due to gravity because the matter in the nebula that formed earth was spinning because earth forms more than 99% of the mass of the solar system because the hydrogen atoms inside the nebula fused to form helium