Name Datc CHEM 105 Chemistry or Health Prefesionah Problem Set 2: Basic Atomk St
ID: 565822 • Letter: N
Question
Name Datc CHEM 105 Chemistry or Health Prefesionah Problem Set 2: Basic Atomk Structure Werksheet 1. Define atom 2. Define mass number, A 3. Define atomic number, z What are the relative masses of a proton, a neutron and an clectrom? 5. Describe how you calculate the number of neutrons of an isotope from its mass number(A) and its atomic 6 The 3 particles of the alom are Their respective charpes are: . The number of protons in one atom of an element determines the atom's number of eloctroms determines the and the of the element. in one atom of an element. It 8. The atomic number tells you the number of also sells you the number of number gives the "identity" of an clement as well as its location on the periodic table. No two difierent dlements will have the 9, The or ibotopes, considering the in a neutral atom of that element. The atomic atomie number of an elament is the avcrage mass of an element's maturally occurring atom. of cach isotope 10. The of an element is the total number of protoes and neutrons in the of the atom 1. The mass number is used to calculate the number of To calculate the number of neutrons you mast subtract the in one atom of an element from the Name Date 12. Given the elements name and its mass number give the complete isotopic symbol and the number of ncutrons for the following: Iron-58 Oxygen Krypton-78 Beomine-79 Copper-65 13. Give the element symbol of and the number of electroes in a neutral atom of Uranium Boron XenonExplanation / Answer
1) atom is the smallest constituent unit of matter that has all properties of an element.
2) mass number is the sum of the number of protons and neutrons present in the nucleus.
3) Atomic number is the number of protons present in a nucleus.
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