The number of protons in an atom determines which element it is, while the number of neutrons determines which isotope it is.For example, strontium-86 has 38 protons and 48 neutrons, whereas strontium-87 has 38 protons and 49 neutrons.Continue reading The most widely used tool to measure the age of the Earth is radioactive decay.The great scientist Ernest Rutherford was the first to define the concept of “half-life,” that is, the time it takes for one half of the atoms in a given quantity of a radioactive element (such as plutonium) to decay into another element (such as uranium), or for one isotope of an element (such as carbon-14) to decay into another isotope of that same element (such as carbon-12).Radiometric dating works by measuring how much a radioactive material has decayed, and using its known decay rate to calculate when the material was solidified.There are a variety of ways of doing this; here is a common method.
it is dated based on where "Fossil B" fits on the phylogenetic tree relative to "Fossil A"). when an unstable parent atom becomes a stable daughter atom, the dating of the specimen can no longer be done accurately), dating of old fossils is generally impossible to do directly.
By giving his bones a date of 9,000 years old, they are claiming to prove that Adam and Eve were not placed on this earth about 6,000 years ago, which would be the date a Bible scholar would pick for the creation of Adam and Eve.
When you have a wide variety of animals at a specific water hole, there is likely to be fighting, either because these species always fight when they are in the same location or they may fight to get water, such as during a drought.
Note that Carbon Dating uses a different method that I will discuss momentarily .
The radioactive material is alway decaying into something, but if the material is in a molten state, the decay products will not stay in place.
Radioactive elements, such as rubidium-87 (but not strontium-86 or strontium-87), decay over time.