These are basic particles from which matter could be made except (a) atom (b) salt molecule

How are isotopes of the same chemical element alike? how are they different?

The same side of the moon always faces earth because the

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.