Start Radiometric dating assignment

Radiometric dating assignment

Andrew Kulikovsky spoke on one occasion and John Hartnett spoke on 2 occasions. About half those who are on the committee are YECs and the others doubt the YEC position to various degrees.

What kinds of bonding occurs in each of the three materials you listed in question #1? Explain how atoms can be arranged in such a way to create a permanent magnet.4. Potassium-40 decays into argon-40 with a half-life of 1.2 billion years.

Identify 10 objects in your home that use semiconductors. A particularmineral grain is known to have had a million potassium atoms in its crystal structurewhen it formed.

Radiometric Dating For this week’s assignment, please answer EACH of the following questions/prompts,and postthem to the drop box as a single document.1. What types of researchers and scientists use carbon-14 radiometric dating?

Name the three kinds of strength used to characterize materials AND give an example ofa material that are strong in each of these modes.2. What type ofresearcher would use the other isotopes such as uranium-238? Use the periodic table to identify the element, its atomic number, mass number andelectrical charge of the following:#Protons181736 #Neutrons081850 #Element Electrons Symbol181836 Atomic Number Mass Electrical Charge 9.

It is a variation of radiometric type of radiometric dating is only good for finding information about matter that once lived and used carbon dioxide.

Carbon-14 is formed by cosmic rays blasting the protons causing a barrage of neutrons.

Jim stated that “uranium is preferentially encased in these [zircon] crystals while lead is preferentially excluded” but did not fully explain the significance of this.

It can be experimentally confirmed that molten Zircon rejects lead.

How will the emission of an alpha particle affect the following? (Note: You can look up element symbols on the periodic table.) 3. The equation will appear at the end of the animation. What isotope remains after the alpha decay of polonium-212? Practice: Click Reset, turn off Show equation, and select Radium. Gamma rays are often emitted during beta decay as well. Fill in the first set of boxes with the mass number and atomic number of the daughter product and the next set of boxes with the mass number and atomic number of the beta particle. Fill in the equations for the beta decay of iodine-131 and sodium-24 in the spaces below. Activity C: Protons into neutrons Get the Gizmo ready: • Click Reset, and turn off Show equation. If a positron and an electron meet, they will annihilate one another in a burst of gamma rays. The positron will fly through space until it encounters an electron. Fill in the first set of boxes with the mass number and atomic number of the daughter product and the next set of boxes with the mass number and atomic number of the positron. Fill in the equations for the positron emission of xenon-118 and manganese-50 in the spaces below. Fill in the last set of boxes with the mass number and atomic number of the daughter product. This process, called decay, causes the radioactive atom to change into a stable daughter atom. • Check that the Half-life is 20 seconds and the Number of atoms is 128. Run a simulation with the Half-life set to 5 seconds, and then run another simulation with the Half-life set to 35 seconds. Trial 0 s 10 s 20 s 30 s 40 s 50 s 1 2 3 4 5 Averages: 15.

Write an equation for the alpha decay of radium, and then use the Gizmo to check your answer. Think and discuss: Helium is the second most abundant element in the universe, but it is rare in Earth’s atmosphere. Question: How does beta decay change the nucleus of a radioactive atom? How will beta decay affect the atomic number and mass number of the atom? (Note: The atomic number of an electron is -1.) Check your answer by turning on Show equation and clicking Play. What isotope is produced by the beta decay of carbon-14? Question: How do positron emission and electron capture change an atom? How will positron emission affect the atomic number and mass number of the atom? (Note: The atomic number of a positron is 1.) Check your answer by turning on Show equation and clicking Play. What isotope is produced when carbon-11 emits a positron? The Half-life Gizmo™ allows you to observe and measure the decay of a radioactive substance. Question: How do we measure the rate of radioactive decay? Observe: Select the BAR CHART on the right side of the Gizmo and click Play. What happens to the numbers of radioactive and daughter atoms as the simulation proceeds? Do the numbers of radioactive and daughter atoms change at the same rate throughout the simulation? Take a screen shot of each of the graphs (5 seconds and 35 seconds) and insert them into your lab. Interpret: How does the Half-life setting affect how quickly the simulated substance decays? Analyze: A half-life is defined as the amount of time it takes for half of the radioactive particles to decay. Collect data: In the first row of the table below, write how many seconds represent one half-life, two half-lives, and so forth.

Particle Location Charge Approximate mass Proton Nucleus 1 1 u Neutron Nucleus 0 1 u Electron Orbitals 1– 0 u 1. Several types of nuclear decay can be explored with the Nuclear Decay Gizmo™. Gamma rays are energetic electromagnetic waves; they are often emitted in nuclear decay. The boxes on the right represent the daughter product—the atom produced by radioactive decay—and the emitted alpha particle. In the top left box, write the mass number of the daughter product and press “Enter” on your keyboard. After filling in the boxes in the Gizmo, write the completed equation below: D. Practice: Click Reset, turn off Show equation, and select Polonium. Select Electron capture, and make sure Tungsten is selected. How will electron capture affect the atomic number and mass number of the atom? Calculate: Note that in this equation the particle is absorbed, rather than emitted. Fill in the electron capture equations for gold-195 and neodymium-141 in the spaces below. Name: ______________________________________ Date: ________________________ Part II – Half-life Vocabulary: daughter atom, decay, Geiger counter, half-life, isotope, neutron, radiation, radioactive, radiometric dating Prior Knowledge Questions (Do these BEFORE using the Gizmo.) 1. If so, what do you hear while the popcorn is in the microwave? If you turn the microwave on for two minutes, is the rate of popping always the same, or does it change? Gizmo Warm-up Like an unpopped kernel in the microwave, a radioactive atom can change at any time. Activity A: Decay curves Get the Gizmo ready: • Click Reset ( ).