Achemist isolates a substance, made of two nonmetals, that is a gas at room temperature. the substance most likely is a molecular compound an ionic compound a noble gas a mixture of the two nonmetals

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?

What does the symbol (–hfus) indicate in a phase change?

An atom with 7 protons, 6 neutrons, and 7 electrons has an atomic mass of amu. (enter a whole number.) numerical answers expected! answer for blank 1: