color coding your periodic table answer key

This quantity is typically measured per mole of atoms (with units kJ/mol).Chemistry Lesson Plans Need links for your students? Visit the Kid Zone for links for chemistry, periodic tables, and pH! Also visit the Lesson Plan Links page for great online resources for chemistry! This variable is measured in picometers.įirst Ionization Energy (kJ/mol) - This numeric variable is a measure of the energy required to remove the most loosely held electron from an atom in the gaseous state. Elements in the same group have similar properties.Ītomic Radius (pm) - This numeric variable is the distance from the center of an atom’s nucleus to its outermost (valence) electrons. Group - This categorical variable indicates which of the numbered groups an element belongs to. Please note that in an effort to make the periodic trends as clear as possible, the dataset excludes elements in periods 6 and 7 and in groups 3-12 (the transition metals).Įlement Name - This categorical variable has values that are the names of the elements.Ītomic Number - This numeric variable represents the number of protons found in the nucleus of every atom of that element. In your analysis, you’ll examine graphic representations of two particular periodic trends - atomic radius and first ionization energy - and draw conclusions about these trends as they apply to the elements of the periodic table. The dataset in this activity comes directly from the periodic table itself. This is essentially the thermodynamic opposite of first ionization energy.Ĭhemical reactivity is the likelihood of a chemical substance to undergo a chemical reaction, either by itself or in combination with other substances.Įlectronegativity is a measure of a particular atom’s tendency to attract shared electrons to itself when the atom is bonded to other atoms. This will produce one mole of gaseous ions, each with a charge of 1+.Įlectron affinity is the amount of energy released when an electron is attached to a neutral atom or molecule in the gaseous state to form a negative ion. In this case, it is the energy required to remove the most loosely held electron from the valence shell of one mole of neutral gaseous atoms. This quantity is typically measured per mole of atoms (with units kJ/mol). More specifically, the distance is between the center of the nucleus and the outermost orbital of valence electrons.įirst ionization energy is the energy required to remove the most loosely held electron from an atom in the gaseous state. The definitions of these terms are as follows:Ītomic radius is the distance from the center of an atom’s nucleus to its outermost (valence) electrons. These patterns include atomic radius, first ionization energy, electron affinity, chemical reactivity, and electronegativity. You will likely study several of the patterns derived from the periodic table in your chemistry class.

Mendeleev’s hypothesized elements were, in fact, discovered as the technical capabilities of chemistry and physics labs grew over time. Mendeleev used the periodic law to leave empty spaces in his periodic table for elements he predicted would be discovered in the future. These observations became what is now known as the periodic law. When Dmitri Mendeleev and Lothar Meyer were each working on their own versions of a table of the elements in the mid-to-late 1800s, each scientist observed something interesting: There were certain patterns of physical and chemical properties that repeated over and over when the known elements were arranged by increasing atomic mass.

Color coding your periodic table answer key