Abrick has dimensions of 25 cm x 5.0 cm x 15 cm. what is the volume of the brick in cubic meters?

1) how many electrons are in each energy level of the following elements? a. he b. na c. na d. ne 2) how many valence electrons are percent in the following atoms? a. s b. mg c. be d. cl 3) which of the following elements are stable as atoms? a. he b. o c. cl d. ar if you are able to provide the work as to how you got the answers that would be greatly appreciated. : )

List four observations that indicate that a chemical reaction may be taking place

Melissa is interested in her family tree and how her family has changed over its many generations. melissa probably more closely resembles