In this lesson you will be introduced to the modern periodic table and its arrangement of the elements. You will also learn about the trends in four properties exhibited by the elements.
By the end of this lesson, students should be able to:
- locate metals, non-metals and metalloids in the periodic table;
- describe the properties of metals, non-metals and metalloids;
- define the Periodic Law;
- list the various groups of elements and describe their common properties including physical state at room temperature, metling and boiling points and reactivity;
- explain how electrons determine the reactivity of the atoms of an element and how electrons ara arrange in atoms using Bohr-Rutherford diagrams;
- explain the relationship between the energy of an electron (kinetic “motion” energy) and energy levels or shells that is number of electrons per energy level;
- describe what an ion is and the count of negative charges (electrons) and positive charges (protons) in positively (cations) and negatively charged ions (anions);
- define Atomic Radius (AR), Ionization Energy (IE), Electron Affinity (EA) and Reactivity;
- describe the trends in AR, IE, EA and Reactivity down a group and across a period (from left to right)
- provide detail explanations for the trends in AR, IE, EA, and Reactivity observed among elements in the same group or in the same period.
Let’s start by looking at Atoms, Elements and the Periodic Table in the video lesson below. Please take detailed notes as you watch the lesson.
Next, watch the video lesson below on the Periodic Trends in Atomic Radius, Ionization Energy, Electron Affinity, and Reactivity. Please write detailed notes as you watch lesson.