Vocabulary (Radioactive) Lee Notes: Date: 2/3/15 Isotope All atoms of an element have the same number of protons. The number of neutrons can vary. ex. Chlorine (Cl). All atoms of Cl have 17 protons but it can have 18 or 20 neutrons. So , when an element has more neutrons than protons it is called an isotope. NOT all isotopes are radioactive!!!!! Radioactive Isotopes Some nuclei of isotopes are unstable and tend to break down (decay). When this happens the nuclei also emit energy in the form of radiation. Good use of Radiation: chemotherapy to treat cancer Bad use of Radiation: bombs Date: 2/4/15 Is the spontaneous decay of the nucleus it will either lose protons, or neutrons, can change a proton to a neutron, or change a neutron to a proton. Because of the number of protons identifies the element, this decay will change the element. Absolute Age Dating of Rocks. This allows scientists to put a number on rocks and fossils. Half Life The length of time it takes for one half of the original isotope (parent rock) to decay.
This allows scientists to put a number on rocks and fossils. Half Life â. The length of time it takes for one half of the original isotope (parent rock) to decay.
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2. What is another word for buddy or pal? 3. How would you describe a person who has exceptional talent? 4. What type of race uses several members, each of whom finishes a part of the race? 5. What does a cat do before it leaps? 6. Which word means t
acorns (= nuts falling from trees) tangerines (= a kind of orange) brown leaves on the trees cherry blossom leaves on the trees falling down new flowers orange leaves on the trees new leaves on the trees no leaves on the trees migration (= birds fly