A radioisotope is placed near a radiation detector, which registers 80 counts per second. Eight hours later, the detector registers 5 counts per second. What is the half - life of the radioactive isotope

An ___ carries a negative electrcal charge, and is located outside an atoms central core

Why does increasing the temperature make solutes dissolve in water quicker? a. it decreases the surface area of the solute b. it raises the pressure of the water molecules c. it prevents the solute from crystallizing d.

5. How is mercury different from all of the other metals

Which half reation equation represents the reduction of an iron (II) ion? Fe+2->Fe+3 + e - Fe+2 + 2e - - >Fe Fe+3 + e - - > Fe+2 Fe->Fe+2 + 2e-

How to compare and contrast more than one thing

What kind of chemical bond does salt have?

How does phosphorus enter the human body?

When a reaction occurs between atoms with ground state electron configuration 1s2 2s1 and 1s2 2s2 2p5 the predominant type of bond formed is

How does heat transfer takes place between any two systems?

Hydrate name of CaCl2 * 8 H2O