What is one way to describe elements?

a.
they are the smallest particles of any material.

b.
they are the building blocks of matter.

c.
they are the most expensive materials on earth.

d.
they break down easily.

Write the balanced equation for a reaction between aqueous nitric acid (hno3) and solid lithium metal (this is a single replacement reaction)

If you chip a tooth, most likely you will go to the dentist to have the missing material filled in. currently the material used to fill in teeth is a polymer that is flexible when put in, yet is hardened to the strength of a tooth after irradiation with blue light at a wavelength of 461 nm. what is the energy in joules for a photon of light at this wavelength?

Draw two cyclic constitutional isomers of cis-1