#1: which element has the same number of energy levels as bromine (br) and the same number of valence electrons as barium (ba)?
a. potassium (k)
b,. beryllium (be)
c. cadmium (cd)
d. calcium (ca)

Which statement about the stamps is correct?

What is the empirical formula of c6h18o3? ch3o c2h5o c2h6o c2h5o5

Why does earth rotate? because earth is formed from cold gases collapsing due to gravity because the matter in the nebula that formed earth was spinning because earth forms more than 99% of the mass of the solar system because the hydrogen atoms inside the nebula fused to form helium