What do an atom of the chlorine and an atom of bromine both have?

Which of the following will not cause mass extinction? a. drastic change is weather b. geological change c. both a and b d. none of the above

Which statement is true about the cell theory? a) it is well-supported by evidence. b) it is unchangeable and permanent.

When elements that form a mineral dissolve in hot water, they form a mixture called a(n) a)geode b)vein c)evaporation d)crystallization e)magma f)lava g)solution h)gem