ACS Gen Chem 1 Exam Questions Only |100% Correct|

ACS Gen Chem 1 Exam Questions Only |100% Correct| Ion A species of an element in which the number of electrons does not equal the number of protons. Isotope Each isotope of an atom has a different number of neutrons. Isoelectric Two atoms with the same charge. Isotopic Two atoms with the same number of neutrons. Transition Metal Orbitals The 4s orbital is filled before the 3d orbital, but listed after. Paramagnetic Atoms that possess a permanent magnetic charge due to the presence of unpaired electrons. Electropositive Tending to lose electrons and form positive ions. Tetrahedral Bond Angle 109.5° Resonance Structures Two equally correct arrangements of one molecule's electrons; generally the molecule exists as an average of the two. Polar Molecule A molecule that is mostly positive on one side and mostly negative on the other. sp³ Orbital An orbital composed of one s orbital and three p orbitals; can hold eight total electrons. Tetrahedral. Trigonal Planar The way that three objects will arrange themselves around a central atom. Non-polar. Free Radicals Compounds with an odd number of electrons in their Lewis Structure. Eg. NO₂ Incomplete Octets Occur in elements that can form stable bonds with less than eight electrons. Eg. BF₃ Expanded Octets Occur in the third row of the periodic table and beyond in elements that can form stable bonds with more than eight electrons. Eg. XeF₂ Hydrogen Bonding When hydrogen is attracted to electronegative atoms. Sigma Bonding Formed by head-on overlapping between orbitals