Number 11 & 12 11. 226. 4
88. Ra—> ___+ 2. He+ Gamma rays
12. 214. 0
82 Pb—>___ -1. e+gamma rays

Wish i can but don’t know this

Answer///precipitate;

You can look it up online and some images should pop up 

For lesson: cameras, plant presses, newspaper, paper towels, clip boards, pencils, calculators, field guides, metric measuring tapes, paper, transect squares, colored pencils, ph meters, light meters, computers, etc.for extension: baggies for soil samples collecting, distilled water, hand shovels, beakers, boiled rice, microscopes, well microscope slides or regular microscope slides with cover slips