PLEASE HELP Which statements describe what is gained or lost during radioactive decay? Check all that apply.

Atoms gain other atoms.
Elements take in energy.
Atoms lose smaller particles.
Elements gain smaller particles.
Energy and particles are released.

Jewelweed, a flowering plant, has seed pods that burst open when touched and forcefully eject their seeds. these structures are favorable because they a. can cause genetic changes to occur. b. prevent germination within the seed pod. c. aid in the dispersal of the species. d. attract insects that aid in pollination.

How many moles of no2 will form when 3.3 moles of cu are reacted with excess hno3?

What is the energy in joules of a mole of photons associated with visible light of wavelength 486 nm?