The atomic mass of boron is 10.811. What is the mass number of the most
abundant isotope of boron?
A.9
B.12
C.11
D.10

How to convert a density of 0.791g/cm3 to lb/ft3

The twister and runaway train are two coasters at the same amusement park. both coasters start at the same height. the coaster for the twister is twice the mass of the coaster for the runaway train. which roller coaster has greater gravitational potential energy at the start of the ride?

Consider the four elements above. which one of these elements will combine with oxygen in a 1: 1 ratio?