When an atom gives off energy in the form of light, a. it becomes excited. b. it becomes more stable. c. it returns to ground state. d. both b & c e. none of the above.

3. How is the atomic emission spectrum of an element related to these flame tests?

why are plasmas of great interest to scientists or manufacturers. descride 2 current uses of plasmas and describe 1 way scientists and engineers hope to use plasmas in the future

Write the chemical reaction that is responsible for the ph of a buffer which contains nh3 and nh4cl. write the reaction in such a way that is appropriate for a ka.

What is the best description of the bohr model of the atom?

A compound consists of 4.50 g of nitrogen for every 7.71 g of oxygen and has the same empirical and molecular formula identify the compound

A 25 N and 5 N force pull to the right. Friction is 10 N. If the object is 5 kg, find the net force and acceleration.

What properties of matter are intensive independent of their size

What is the density of an object having a mass of 8.0g and a volume of 25cm3

What is a Cilla? (In drawing)

Which term names the group of organisms able to interbreed and produce fertile offspring?