The double-slit experiment with electrons demonstrated the surprising realization that?
1. electrons are quanta of energy
2. light behaves both as a particle and a wave
3. electrons can sometimes behave like waves
4. the microscopic behavior of matter is predictable

Sally is making a model of a magnesium atom with an atomic mass number of 24 for her chemistry class. she has foam balls for the protons, neutrons, and electrons. she has added 6 neutrons to her model so far. how many more neutrons does she need to add to complete her neutral atom of magnesium?

Ais a mountain created from eruptions of lava, ash, rocks, and hot gases.

How many moles of lead are in 1.50 x 10^12 atoms of lead? could you explain the answer as well and not just give it to me i am refreshing for finals and i need to know how to do it