21 WILL MARK BRAINIEST
There is a 56 g sample of Carbon-12. After 2 half-lives, how much of the Carbon-12 sample is
left? *
(3 Points)

12
14
28
7

Ais useful when you need a simple machine to you separate two things. a. lever b. screw c. pulley d. wedge

Wave functions describe orbitals in a hydrogen atom. each function is characterized by 3 quantum numbers: n, l, and ml. if the value of n = 2: the quantum number l can have values from to . the total number of orbitals possible at the n = 2 energy level is .

What part of the ear is names after tools, such as the hammer and the anvil?