How many valence electrons does lithium have? 1ī Now look at your periodic table.
Assuming that the inner rings are full of electrons, how (Electrons in the inner ringsĪre not shown you can assume these rings are full.)Ī. The first ring holds two electrons, and the second holds eight. Count: Electrons move around the nucleus of atoms in specific shells, shown by the rings around the atoms.Question: What happens when atoms gain or lose electrons? With the same charge (+ and + or – and –) repel. Particles with opposite charges (+ and –) attract, while particles Electrons are negativelyĬharged, while protons are positively charged. Introduction: Some of the particles that make up atoms have an electrical charge. Check that sodium and chlorine are still selected.Try moving an electron from the metal to the nonmetal. Based on this experiment, which atom is a metal?ī. Try pulling an electron away from each atom. How tightly the valence electrons are held.Ī. Valence electrons very tightly, while nonmetals hold their electrons tightly. Elements can be classified as metals and nonmetals. How many valence electrons does each atom have? Sodium: 1 Chlorine: 7 The outermost electronsĪre called valence electrons. Each atom consists of a central nucleus and several shells that contain electrons.(Note: These atom models are simplified and not meant to be realistic.) Click Play ( ) to see electrons orbiting the nucleus of eachĪtom. To begin, check that Sodium (Na) and Chlorine (Cl) are selected from the The Ionic Bonds Gizmo allows you to explore how ionic bonds form. Just like students sharing markers, atoms sometimes share or swap electrons. Maggie can give up two markers, one of which can go to each Fred and Florence. How can they share markers so each has 8?
Maggie has 10 markers, but Fred and Florence each Maggie is sitting at a table with Fred and Florence.Since there are 8 markers in a set, Nate would have to give one marker to Clara. What can Nate and Clara do so that each of them has a full set? Nate and Clara are drawing pictures with markers.Prior Knowledge Questions (Do these BEFORE using the Gizmo.)
Vocabulary: chemical family, electron affinity, ion, ionic bond, metal, nonmetal, octet rule, shell, valence Name: Sharanya Saxena Date: 16 October, 2020 Student Exploration: Ionic Bondsĭirections: Follow the instructions to go through the simulation.