Download POGIL 4 Coulombic Attraction Key and more Study notes Chemistry in PDF only on Docsity! Coulombic Attraction 1 Honors Chem Block _____ Name _______________________ POGIL 4 Key Coulombic Attraction What variables will affect the force of attraction between charged particles? Coulombic attraction is the attraction between oppositely charged particles. For example, the protons in the nucleus of an atom have attraction for the electrons surrounding the nucleus. This is because the protons are positive and the electrons are negative. The attractive force can be weak or strong. Explore the strength of attraction between protons and electrons in various atomic structures below. Distance and Force of attraction 1. What subatomic particles do these symbols represent in the drawing above: Proton Electron 2. What are the independent and dependent variables in the data? Charge and distance are independent Force of attraction is dependent 3. What relationship do you observe between the independent and dependent variables in this case? Force of attraction between two particles is directly proportional to charges of particles and inversely proportional to the distance. 4. If the distance between a proton and electron were 0.50 nm, would you expect the force of attraction to be greater than or less than 0.26 x 10-8N? Explain. The force of attraction would be weaker than 0.26 x 10-8N. It is inversely proportional to the distance. Greater distance = weaker force. 5. If two protons were 0.10 nm away from one electron, would you expect the force of attraction to be greater than or less than 2.30 x 10-8N? Explain. I would expect the force of attraction to be greater, since the charge of two protons is bigger than the charge of one. POGIL™ Activities for High School Chemistry 2 The Alkali Metals 6. Consider the diagrams above. a. What do the arrows represent? The arrows represent force of attraction. b. How does the thickness of the arrows relate to the property given in part a? The thicker the arrow, the stronger the force 7. Using a periodic table, locate the elements whose atoms are diagrammed above. Are the elements in the same column or the same row? These elements belong to the same column (group, family) 8. Circle the outermost electron in each of the diagrams. a. As you move from the smallest atom to the largest atom in the diagrams, how does the distance between the outermost electron and the nucleus change? The distance increases b. As you move from the smallest atom to the largest atom, how does the attractive force between the outermost electron and the nucleus change? The force decreases c. Are your answers to parts a and b consistent with the information on the first page? Yes they are
