What characterizes a chemical change?

How do atoms become ions?

An element's atomic number is 63. How many protons would an atom of this element have?

Classify the following bonds as ionic, covalent, or neither (O, atomic number 8; F, atomic number 9; Na, atomic number 11; Cl, atomic number 17; U, atomic number 92). O with F Ca with Cl Na with Na

A chemical process that takes place in an organism and is essential to life is called?

Layers of sand and other sediments that become sedimentary rock

What change would you expect on the rate of theSN2 reaction of 1-iodo-2-methylbutane withcyanide ion if the nucleophile concentration isunchanged and the alkyl halide concentration isdoubled?

The nuclear reaction that occurs by combining two or more lighter atoms into a larger one is called what? a. nuclear fusion b. nuclear fission c. beta emission d. alpha emission

Though energy can change forms, the total amount of energy in the universe remains constant. True or false

a dynamic state where two opposing forces are in balance, where two opposite event are occurring at equal rate is

What is mitosis in a living cell?