 Dalton’s Atomic Theory and other important scientists RutherfordGoldstein ThomsonGell-Mann BohrChadwick SchrodingerDemocritus Millikan.

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Presentation transcript:

 Dalton’s Atomic Theory and other important scientists RutherfordGoldstein ThomsonGell-Mann BohrChadwick SchrodingerDemocritus Millikan

 An element has an atomic number of 76. What is the number of protons and electrons in a neutral atom of this element?

 How is the number of neutrons in the nucleus of an atom calculated? Write a formula representing the number of neutrons in the nucleus.

 All atoms of the same element have the same _____.

 Isotopes of the same element have different _____.

 Using the periodic table, determine the number of neutrons in 16 O.

 What does the number 84 represent in the name krypton-84?

 Who discovered the neutron?

 Dalton’s Atomic Theory makes two assumptions that are incorrect. What are they?

 The element Indium has __ protons and ___ electrons.

 How do the isotopes of hydrogen-1 and hydrogen-2 differ?

 Why did J. J. Thomson reason that electrons must be a part of the atoms of all elements?

 What are the names of the following elements? 38 X and 39 X

 Describe the model of the atom as a result of Rutherford’s discovery of the nucleus. Draw a model showing the particles and their locations.

 The smallest particle of an element that retains the properties of that element is a(n) ____.

 How many protons, electrons, and neutrons does an atom with atomic number 50 and mass number 125 contain?

 An element called “X” has 10% of the isotope with a mass amu, 20% of the isotope with mass amu, and 70% of the isotope with mass amu. Calculate the atomic mass of element X.

 How many protons are present in an atom of Beryllium-9?

 Calculate the number of neutrons in Lead-210.

 Determine the number of electrons in an atom of Iridium.

 Chlorine has two naturally occuring isotopes, Cl-35 has a mass of amu, and Cl-37 has a mass of amu. If chlorine has an average atomic mass of amu, what is the percent abundance of each isotope?