# Example concept half life used radiometric dating

### Example concept half life used radiometric dating - speed dating suffolk county new york

There is no going back – the process is irreversible. When we pour our popcorn kernels into a popcorn popper, the is no way to know which will pop first.And once that first kernel pops, it will never be a kernel again..is forever changed! ) Teaching example using popcorn to teach radioactive decay "A variety of a chemical element (strictly, of one particular element) which is distinguished from the other varieties of the element by a different mass number but shares the same atomic number and chemical properties (and so occupies the same position in the periodic table)." That definition may not mean anything to them.

Even if they have been given the definition, they interpret the term to mean one-half the life of the system.

Those that decay are called radioactive (or parent) isotopes; those that are generated by decay are called radiogenic (or daughter) isotopes.

The unit that we use to measure time is called half-life and it has to do with the time it takes for half of the radioactive isotopes to decay (see below).

Half-life is a very important and relatively difficult concept for students.

Mathematically, the half-life can be represented by an exponential function, a concept with which entry-level students may not have much experience and therefore may have little intuition about it.

Statistical probablity is the only thing we can know exactly.

Often students get bogged down in the fact that they don't "understand" how and why radioactive elements decay and miss the whole point of this exercise.The element itself is defined by the atomic number (i.e., the number of protons).Only certain isotopes are radioactive and not all radioactive isotopes are appropriate for geological applications – we have to choose wisely.They may ask, "What's the difference between an isotope and an atom?" Another way of explaining it is that when geologists talk about isotopes, they are talking about one element of differing masses.The atoms that are involved in radioactive decay are called isotopes.