Solve these clues to fill the grid.
- Layer of air around the Earth
- 5 Across
- Any of the nine large celestial bodies in the solar system that revolve around the sun and shine (plural)
- 7 Across
- The order of an element in Mendeleyev's table of the elements
- 11 Across
- Deriving destructive energy from the release of atomic energy
- 12 Across
- The smallest component of an element having the chemical properties of the element
- 14 Across
- The logarithm of the reciprocal of hydrogen-ion concentration in gram atoms per liter
- 16 Across
- A unit of electrical energy equal to the work done when a current of one ampere passes through
- 1 Down
- Radioactive ___ of an atomic nucleus that is accompanied by the emission of an ___ particle
- 2 Down
- A giant planet with a ring of ice particles
- 3 Down
- A unit of potential equal to the potential difference between two points on a conductor carrying
- 4 Down
- The smallest planet and the nearest to the sun
- 6 Down
- Study of the natural world through experiments
- 8 Down
- An elementary particle with 0 charge and mass about equal to a proton
- 9 Down
- A stable particle with positive charge equal to the negative charge of an electron
- 10 Down
- Bottom part something stands on; a safe spot in baseball
- 13 Down
- How much matter something contains
- 15 Down