1. It is the generation of photoelectrons.
2. The existence of a threshold frequency.
The producers of an ecosystem make energy available to all the other living parts of an ecosystems. Consumers like humans eat the food that producers like plants made decomposers decompose dead plants and animals when they die like bacteria is a decomposer
Ernest Rutherford's gold foil experiment was when he shot positively charged particles at a thin layer of gold foil. He concluded that there was a core that contained most of the atom's mass, the core is the nucleus
(3.500 mol MgO)(40.3044g MgO/1mol MgO)
=141.0654
