Consider the statement "i believe the identity of the unknown element is sodium, in part because of it's gray color and in part because the metal reacted with water" which correctly evaluates the statement? a. not reliable because many metals are gray and several react with waterb. reliable because the author believes the statement to be validc. not reliable because the identity of the element was not originally knownd. reliable because it deals with science topics such as metals and chemical reactivity.

b..

is the correct one

explanation:

covalent bonds form as valence electrons are shared between two atoms. lewis structures and structural formulas are common ways of showing the covalent bonding in organic molecules. formal charge describes the changes in the number of valence electrons as an atom becomes bonded into a molecule.

in scientific notation, the value of the  speed of light in a vacuum

  will be written as 2.995 * 10^8. when this value is represented in the form of

  a * 10^b, then, a = 2.995 and b = 8.

the value of the speed of light in a vacuum given above can also be rounded up to approximately 300000000. in this case, the scientific notation will be written as 3 *10^8.