Chapter 4 Review “Atomic Structure”
Chapter 4 Review All atoms of the same element have the same _____. Know Dalton’s Atomic Theory and Rutherford’s Nuclear Model. 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?
Chapter 4 Review All atoms are neutral, with the number of protons equaling the ___. Isotopes of the same element have different _____. Using the periodic table, determine the number of neutrons in 16O. What does the number 84 represent in the name krypton-84?
Chapter 4 Review What is the correct complete symbol for an atom of tritium? Know who discovered the neutron, and in what year. Dalton said that atoms were indivisible and atoms of the same element were identical. Have any changes been made to this?
Chapter 4 Review The mass number of an element is equal to _____. The sum of the protons and neutrons in an atom equals the __. What is the purpose of comparing the number of atoms of copper in a coin the size of a penny with the number of people on the earth?
Chapter 4 Review The atomic number of an element is the total number of ____. How do the isotopes of hydrogen-1 and hydrogen-2 differ? What hypothesis led to the discovery of the proton? The element Indium has __ protons and ___ electrons.
Chapter 4 Review Why did J. J. Thomson reason that electrons must be a part of the atoms of all elements? Isotopes of the same element have different ____. Know characteristics regarding the nucleus of an atom. Are these the same element? 38? and 39?
Chapter 4 Review Describe the model of the atom as a result of Rutherford’s discovery of the nucleus. The smallest particle of an element that retains the properties of that element is a(n) ____. Know the complete symbol for an element, and what it means: X 20 10
Chapter 4 Review What is the relative mass of an electron? The particles that are found in the nucleus of an atom are ____. Know the ideas from Democritus. Who conducted experiments to determine the quantity of charge carried by an electron?
Chapter 4 Review How many protons, electrons, and neutrons does an atom with atomic number 50 and mass number 125 contain? Who was the man who lived from 460 B.C. – 370 B.C., and was among the first to suggest the idea of atoms?
Chapter 4 Review Know the characteristics of subatomic particles. A fictitious element “X” has 10.0 % of the isotope with mass 55 amu, 20.0 % of the isotope with mass 56 amu, and 70.0 % of the isotope with mass 57 amu. Calculate the average atomic mass of element X. 56.6 amu
Chapter 4 Review Element “Z” has two isotopes: one has mass number of 19.0 amu is 55.0 % abundant, and the isotope with mass number 21.0 amu is 45.0 % abundant. What is the average atomic mass for element Z? How many protons are present in an atom of Beryllium-9? 19.9 amu
Chapter 4 Review Calculate the number of neutrons in Lead-210. Determine the number of electrons in an atom of Iridium. About how many more times massive is a proton than electron? How many neutrons are present in an isotope of uranium-235?
Chapter 4 Review What is the atomic number for an element with 41 neutrons and a mass number of 80? Use the periodic table to determine the number of protons in barium. How many protons are present in the nuclei of the three known isotopes of hydrogen?
Chapter 4 Review What is the mass number for an oxygen atom that has 10 neutrons in its nucleus? How many electrons are in an atom of gold? What is the total number of subatomic particles in the nucleus of an atom of bismuth-209?
Chapter 4 Review End of Chapter 4 Review Use the periodic table to determine the number of electrons in a neutral atom of lithium. Be able to explain the differences between elements and isotopes. Be able to calculate average atomic mass. End of Chapter 4 Review