HELP ME covalent compounds are typically soft and malleable while ionic compounds are typically hard and brittle. Describe what is occurring at the particulate level to cause these physical properties within a covalent solid.

The chart shows the bid provided by four contractors to complete a job. which contractor is the most cost-effective?

The famous scientist galileo galilei did several experiments with sloping planes, which he rolled metal balls down so that he could study motion. by changing the slope, he could study how the speed at which the ball rolled was affected. what was the independent variable in galileo's experiment? a. the speed of the ball b. the slope of the plane c. whether the ball moved d. what the ball was made of

What 3 categories are elements divided