What is similar in the electron configuration of Ge and C? and what is the difference?

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?

The number to the right of an element's symbol (ex. c-12) identifies the of an isotope.

What is the percentage of hydrogen in nitrogen trihydride