In the modern periodic table, each element is represented by its symbol. The number above each symbol is its atomic number. Atomic numbers increase from left to right and from top to bottom in the table.

A100-watt light bulb radiates energy at a rate of 100 j/s. (the watt, a unit of power or energy over time, is defined as 1 j/s.) if all of the light emitted has a wavelength of 525 nm , how many photons are emitted per second?

Matches the chemical name of each oxide of phosphorus to its chemical formula

How have the greenhouse gasses increased from the year 2000 to 2018