Atomic Structure SWBAT Name the subatomic particles in
Atomic Structure SWBAT: Name the subatomic particles in an atom Use atomic and mass numbers to distinguish atoms
Structure of the Nuclear Atom �Electrons: negatively charged subatomic particles, orbit the nucleus of the atom, very small (e-) �Protons: positively charged subatomic particles, in the nucleus, much larger (p+) �Neutrons: subatomic particles without a charge, in the nucleus, same size as protons (n 0)
Structure of the Nuclear Atom • Atoms are mostly made of empty space • Protons and neutrons are located in the nucleus, the heaviest part of the atom • Electrons orbit around the nucleus and occupy almost all of the volume of the atom
1. What subatomic particle(s) would you find in position A? A. Electron 2. B. Proton & Electron C. 1. 0, 0 D. 0, - What subatomic particle(s) would you find in position B? A. Electron 4. D. Proton & Neutron What is/are the relative mass and charge of the particle(s) in A? A. 1. 0, + B. 1. 0, - 3. C. Neutron B. Proton & Electron C. Neutron D. Proton & Neutron What is/are the relative mass of the particle(s) in B? A. 8. 0 AMU B. 2. 5 AME C. 4. 0 AMU D. 5. 5 AMU A B
Atomic Number �Elements are different because they contain different numbers of protons �The atomic number of an element is the number of protons in the nucleus of an atom of that element �The mass number of an atom/element is the total number of protons and neutrons in the nucleus ◦ # of neutrons = mass # – atomic #
1. What is the atomic number of the following atom? a. 3 2. c. 9 d. 12 What element is it? a. Carbon 3. b. 6 b. Fluorine c. Boron d. Lithium What is the mass of this atom? a. 3 b. 6 c. 9 d. 12
Isotopes • Isotopes of an element have different numbers of neutrons, but the same number of protons • They have different mass numbers Proton Neutron Hydrogen-1 Hydrogen-2 Hydrogen-3 • The mass number listed on the periodic table represents a weighted average mass of the atoms in a naturally occurring sample of the element
Isotope Symbols • Based on the following graphic, what do you think A, Z, & X represents?
Your-Turn • Working with your table complete the following questions and fill in both tables. • I will come around to check on your progress and participation.
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