color coding the periodic table lab answers

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. There are no naturally-occurring nuclides at all, in which case it is syntheticĪ lot of periodic tables will color-code the symbols of each element (or sometimes write a radioactivity symbol in the box).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. There are no stable naturally-occurring isotopes You can't necessarily determine if an element is radioactive just from its name, symbol, mass, etc. If you mean 'radioactive' (rough interpretation), then see below: If you mean which elements can react to form a compounds, basically all of them (except the heavier synthetic elements and lighter noble gases) have been observed to form at least one compound.

Color coding the periodic table lab answers