1. If you have 25% radioactive parent atoms in a mineral crystal, and 75% daughter atoms, how many half-lives have passed?

In a hydroelectric power plant, water is stored high above a turbine. as it falls, the water spins the turbine blades to generate electricity. which form of energy does the stored water have?

What happens when two forces act in the same direction? A. They cancel each other out. B. The stronger one prevails. C. Their strengths are added. D. Their sum divided by two is the total force.

what is the heat capacity of a 750g object if the object is made from silver with a specific heat of 0.24j/gc

Arrange the metals used in this experiment (including H2 and Ag) in order of decreasing reactivity (most reactive metal first). The metals to be included are Na, Ag, Al, Ca, Cu, Fe, Mg, Pb, Sn, Zn, and H2.

What happens to unstable nuclei

Sarah is ordering cheese pizza for a party of ten people she knows each pizza has 8 slices to figure out how many pizzas to order sarah needs to know the

How many grams of sodium ions are in na2so4?

Electron configuration for iron?

Explain how melting is considered endothermic

In the process of covalent bonding, atoms share electrons. This means that * a) Electrons from each atom are attracted to the nucleus of both atoms b) Protons and neutrons attract c) Atoms lose electrons and become ions d) Atoms gain electrons and