Which two elements have the most similar chemical properties? A)Cl and Ar
B)Be and Mg
C)Na and P
D)Ca and Br

Asa choose the correct set of reaction coefficients to properly balance the following chemical equation according to the law of conservation of mass: __s8 + __o2 ==> __so2 1, 1, 8 1, 8, 1 1, 8, 8 8, 1, 1

As changes in energy levels of electrons increase, the frequencies of atomic line spectra they emit

The volume of an unknown substance in a sealed glass jar is 50 milliliters. the volume of the jar is 200 milliliters. which state of matter could the substance be?