The periodic table organizes the Elements Understanding the periodic table will help you learn about each of the 118 known elements.
Element square Identifies each known element Symbol Name Atomic Number Mass Number
This refers to how many protons an atom of that element has. No two elements, have the same number of protons. Bohr Model of Hydrogen Atom Wave Model
State the number of protons for atoms of each of the following: A. Nitrogen 1) 5 protons 2) 7 protons 3) 14 protons B. Sulfur 1) 32 protons 2) 16 protons 3) 6 protons C. Barium 1) 137 protons 2) 81 protons 3) 56 protons LecturePLUS Timberlake 5
State the number of protons for atoms of each of the following: A. Nitrogen 2) 7 protons B. Sulfur 2) 16 protons C. Barium 3) 56 protons LecturePLUS Timberlake 6
Atomic Mass refers to the “weight” of the atom. Add the number of protons with the number of neutrons. H This is a helium atom. Its atomic mass is 4 (protons plus neutrons). What is its atomic number?
Mass Number – Atomic Number Or Protons + Neutrons - Protons Number of Neutrons Because it’s and average Round the number
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How Many Neutrons in 1. Cr Mass Number = 2. Fr Mass Number = 223 3. Mg Mass Numb er = 4. Si Mass Number =
How Many Neutrons in 1. Cr Mass Number = 2. Fr Mass Number = 223 136 3. Mg Mass Number = 4. Si Mass Number =
Number of protons = Number of electrons Atomic number = Number of electrons LecturePLUS Timberlake 12
How many electrons are in 1. K 2. Ca 3. Ba 4. O 5. Br
How many electrons are in 1. K 19 2. Ca 20 3. Ba 56 4. O 8 5. Br 35
Atoms with the same number of protons, but different numbers of neutrons. Isotopes of chlorine 35 Cl 37 Cl17 chlorine - 35 chlorine - 37 LecturePLUS Timberlake 15
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Naturally occurring carbon consists of three isotopes, 12 C, 13 C, and 14 C. State the number of protons, neutrons, and electrons in each of these carbon atoms. 12 C 13 C 14 C #p _______ _______ _______ #n _______ _______ _______ #e _______ _______ _______ LecturePLUS Timberlake 18
12 C 13 C 14 C #p #n #e LecturePLUS Timberlake 19
An atom of zinc has a mass number of 65. A.Number of protons in the zinc atom 1) 302) 353) 65 B.Number of neutrons in the zinc atom 1) 302) 353) 65 C. What is the mass number of a zinc isotope with 37 neutrons? 1) 372) 653) 67 LecturePLUS Timberlake 20
An atom of zinc has a mass number of 65. A.Number of protons in the zinc atom 1) 30 B.Number of neutrons in the zinc atom 2) 35 C. What is the mass number of a zinc isotope with 37 neutrons? 3) 67 LecturePLUS Timberlake 21
Write the atomic symbols for atoms with the following: A. 8 p +, 8 n, 8 e - ___________ B.17p +, 20n, 17e - ___________ C. 47p +, 60 n, 47 e - ___________ LecturePLUS Timberlake 22
16 O A. 8 p +, 8 n, 8 e - 8 B.17p +, 20n, 17e - 37 Cl 17 C. 47p +, 60 n, 47 e Ag 47 LecturePLUS Timberlake 23