Webb is testing samples of different elements. One sample is a dull, yellow solid that breaks into powdery pieces when he hits it with a hammer. How should Webb classify
the yellow solid?
As a metal
As a nonmetal
As a gas
As a metalloid

Imagine that you have produced several versions of lactase, each of which differs from normal lactase by a single amino acid. describe a test that could indirectly determine which of the versions significantly alters the three-dimensional shape of the lactase protein.

Which is a difference between molecular compounds and ionic compounds? select the correct answer below: question 5 options: molecular compounds typically form between a metal and a nonmetal, while ionic compounds typically form between nonmetals. molecular compounds result from the transfer of electrons between atoms to form ions, while ionic compounds result from the sharing of electrons between neutral atoms. molecular compounds are formed of discrete, neutral molecules, while ionic compounds are formed of large repeating arrays of opposite charges. molecular compounds have high melting points and high boiling points, while ionic

Describe the difference between a. a hypothesis and a theory and b. an observation and an experiment.