What are two ways that isotopes of an element differ?

What semimetal can form four single covalent bonds.

Which process does not require the presence of a physical substance in order to transfer heat? air in the atmosphere is heated by the ground. this warm air then rises, and cooler air falls. this is an example of what type of process? how is conduction different from radiation?

Which of the following is not one of the steps in the scientific method a. hypothesize b. summarize c. analyze d. familiarize