Which best explains why a crystal is incompressible? Its molecules remain in position without vibrating.
The molecules of a crystal behave like those of a gas.
There is little, if any, space left between its adjacent molecules.
Its molecules switch positions when they are compressed.

How many grams of mgbr2 are needed to produce 75g or metal?

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:

Which of these statements best explains why space exploration should be encouraged? it prepares humans to live without oxygen. it dispel myths about objects in space. it prevents comets and asteroids from striking earth. it creates technology to absorb harmful radiations in space.