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Radiometric dating is : Atomic number of an element , the number of protons in nucleus. All atoms of element have same atomic number. Isotopes are atoms of the same element that differ in the number of neutrons Most elements have several isotopes.
how earth was made: solar system was swirling mass of gas and dust. Over time, the material was all pulled together by gravity and it formed the sun. Remaining gas, dust, and debris circled the sun then the gravity pulled in more debris and this was contently done to form earth
radioactive dating
Scientist explored earth surface + examine many of its layers to establish a complete picture of its geologic history they also examine the sedimatery rocks in earths crust.
Mass number is the total number of protons and neutrons in the nucleus
how earth was dated
RADIOACTIVE ISOTOPES Radioactive decay Rate of decay of radioactive isotopes Occur naturally in all matter Commonly used in radiometric dating procedure
radioactive decaying
Radiometric dating is accurate within certain limits
Radioactive decay is the isotope that has unstable nuclei. It has to release particles or radiant energy or both until nuclei release
