Basic Atomic Structure Worksheet

Basic Atomic Structure Worksheet The 3 particles of the atom are: Protons, electrons, and nuetrons Their respective charges are: Positive p+, negative n-, neutral n* The number of protons in one atom of an element determines the atom's __________, and the number of electrons determines the ____________ of the element Identity , charge The atomic number tells you the number of ________ in one atom of an element. It also tells you the number of ________ in a neutral atom of that element. Protons , electrons The atomic number gibes the "identity" of an element as well as its location on the periodic table. No two different elements will have the _________ atomic number Same The ____________ of an element is the average mass of an element's naturally occurring atom, or isotopes, taking into account the _________ of each isotope Atomic mass (average) , percent The ______________ of an element is the total number of protons and neutrons in the ___________ of the atom Mass number , nucleus The mass number is used to calculate the number of __________ in one atom of an element. In order to calculate the number of neutrons you must subtract the ___________ from the _____________ Neutrons , atomic number , mass number Name the element which has the following numbers of particles: 26 electrons, 29 neutrons, 26 protons Iron Name the element which has the following numbers of particles: 53 protons, 74 neutrons Iodine Name the element which has the following numbers of particles: 2 electrons (neutral atoms) Helium Name the element which has the following numbers of particles: 20 protons Calcium Name the element which has the following numbers of particles: 86 electrons, 125 neutrons, 82 protons Lead Name the element which has the following numbers of particles: 0 neutrons Hydrogen If you know ONLY the following information can you ALWAYS determine what the element is? (Yes/No): Number of protons Yes If you know ONLY the following information can you ALWAYS determine what the element is? (Yes/No): Number of neutrons No If you know ONLY the following information can you ALWAYS determine what the element is? (Yes/No): Number of electrons in a neutral atom Yes If you know ONLY the following information can you ALWAYS determine what the element is? (Yes/No): Number of electrons No Neutrons = _______ - _________ Mass number - Atomic number (Mass # - Atomic #) 1/1