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Isotopes. The number of neutrons in any specific type of atom can vary. Atoms of the same element with different numbers of neutrons are called isotopes. Isotopes are distinguished from each other by including the mass number with the name or symbol. Name Symbol Atomic # Mass # # Protons # Neutrons # Electrons 235U. 238U. Carbon-12. Carbon-13. Ions

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Bohr Model Worksheet For each element draw the inner electrons blue & the valence (outer) electrons red. The circles represent possible electron shells.

Sep 02, 2018 · Uranium-235 and uranium-238 are isotopes of uranium. Each uranium atom has 92 atoms (which you can verify using a periodic table), so these isotopes contain 143 and 146 neutrons, respectively. Over 99 percent of natural uranium is the isotope uranium-238, so you can see that the most common isotope isn't always one with equal numbers of protons ...
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Calculate the average atomic mass of iridium using the following data for two iridium isotopes. Isotope mass (u) relative abundance. Ir-191 191.0 37.58%. Ir-193 193.0 62.42%. Lithium has two naturally occurring isotopes: lithium-6 and lithium-7. If the average atomic mass of lithium is 6.941 amu, which isotope is the most abundant?
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Directions: Use your Periodic table to complete the worksheet. 1. What is the atomic symbol for silver? 2. What is the atomic mass of mercury? 3. Ni is the symbol for what element? 4. The element that has the atomic number 17 is? 5. List the symbols for two transition metals. 6. Cu, Ag, and Au are all in what group # 7. Name two noble gases 8.
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Atomic Particles, Atoms, Isotopes, and Bonding Worksheet Atomic Particles (amu = atomic mass unit) Name Symbol Charge Mass Location Electron e- -1 0 Energy shells surrounding nucleus Proton p+ +1 1 amu Nucleus Neutron n 0 1 amu Nucleus Atomic mass = total mass of atom = # of protons + # of neutrons
Honors Chemistry Worksheet on Periodic Table Page 2. The most common oxyacid of the element sulfur is H2SO4, sulfuric acid. Predict the formulas of readily available oxyacids of selenium and chromium. In which of these predictions would you feel most confident? Explain. How does atomic size (radius) vary within a given family (group or vertical ...
Isotopes Teacher Resources. Find Isotopes lesson plans and worksheets. In this isotopes worksheet, students find the average atomic mass given the masses of two isotopes.
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  • Isotope Practice Worksheet Name: 13 14 Here are three isotopes of an element: 612C 6 C 6 C The element is: _ The If this number changes for an atom of a specific element you have an (ion, isotope) _? Has the number of protons or neutrons changed?
  • Handwriting Worksheets for Print Practice. Letters, numbers, and the following characters can be used: . ... - Use the underscore character _ to make a division symbol. (Any other characters will...
  • View, download and print Isotopes Worksheet pdf template or form online. 42 Atomic Structure Worksheet Templates are collected for any of your needs.
  • 6. Calculate the average atomic mass of Nitrogen, given that there are two isotopes of Nitrogen. Nitrogen-14 has 14.003amu and 99.63%abundance. Nitrogen-15 has 15.000amu and 0.37% abundance. Show all your work. 7. The element copper has two naturally occurring isotopes. Copper-63 has 62.93amu and 69.2%abundance. Copper-65 has 64.93amu and 30.8 ...
  • Basic Atomic Structure Worksheet 1. The 3 particles of the atom are: ... isotopes, taking into account the _____ of each isotope. 5. The _____ of an element is the ...

These worksheets can be used in the classroom in many different ways. Role play is one effective way to teach vocabulary: you can place students in a specific scenario and have them use the vocabulary...

10. The isotope strontium-90 is produced during the testing of nuclear weapons. If 100.0 mg of strontium-90 was released in the atmosphere in 1960, how much of the radioisotope remains 85 years later? The half life of strontium-90 is 29 years. 11. A radioactive compound Cobalt-60 has a half-life of 5272.0 years.
1. An isotope of cesium (cesium-137) has a half-life of 30 years. If 1,0 g of cesium-137 disintegrates over a period of 90 years, how many g of cesium-137 would remain? A We) r" 2. Actinium-226 has a half-life of 29 hours. If 100 mg of actinium-226 disintegrates over a period of 58 hours, how many mg of actinium-226 will remain? 3.. leon^yX s ,2<h

Hydrogen is found primarily as two isotopes in nature. 11H (1.0078 u) and 21H (2.0148 u). Calculate the percentage abundance of each isotope based on hydrogen’s average atomic mass. Answer = 99.8% and 0.2 %. Lanthanium is composed of two isotopes 13857 La (137.91 u) and 13957 La (138.91 u). Look at the periodic table.

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6. Calculate the average atomic mass of Nitrogen, given that there are two isotopes of Nitrogen. Nitrogen-14 has 14.003amu and 99.63%abundance. Nitrogen-15 has 15.000amu and 0.37% abundance. Show all your work. 7. The element copper has two naturally occurring isotopes. Copper-63 has 62.93amu and 69.2%abundance. Copper-65 has 64.93amu and 30.8 ...