When using a crucible and lid, why must the crucible and lid be inspected for cracks before using?

Periodicity is best defined as:

What type of graph or chart would be best for showing the relationship between bird wing length and average flight distance

Which element is a nonmetal A aluminum B gold C carbon D tin

Are ionic compounds flexible or brittle

What is similar to iodine by chemical characteristics

Which earth cycle does the suns energy drive

How many moles are in 10 grams of CaCl2?

Which is the correct formula for phosphorus pentachloride? PCl4 because a subscript of 4 indicates four Cl atoms PCl5 because a subscript of 5 indicates five Cl atoms P5Cl because a subscript of 5 indicates five P atoms P5Cl3 because a subscript of

Why are the elements in groups 3 to 12 often used to make dyes?

What is not needed for corrosion of metals? a. oxygen c. water b. ions d. sunlight