Across
- 5. resistance or opposition to a force, influence, or movement.
- 6. Every chemical element has one or more
- 8. the chemical element of atomic number 2, an inert gas which is the lightest member of the noble gas series.
- 10. a stable isotope of hydrogen with a mass approximately twice that of the usual isotope.
Down
- 1. of, produced by, or involving nuclear weapons.
- 2. It is used in a medical and scientific setting as a radioactive tracer.
- 3. the star around which the earth orbits.
- 4. is the most prevalent hydrogen isotope, with an abundance of 99.98%. It consists of one proton and one electron.
- 7. relating to chemistry, or the interactions of substances as studied in chemistry.
- 9. smallest unit into which matter can be divided without the release of electrically charged particles.