ACS General Chemistry 1 Study Sheet with Complete Solutions | 2026

ACS General Chemistry 1 Study Sheet with Complete Solutions | 2026 56=Mass # (A) 26= Atomic # (Z) Fe= symbol - answer-56= 26= Fe= Mass Number - answer-Proton+ Neutrons Atomic Number - answer-# of protons/electrons (equal in elemental form) - superscript - answer-Add e- + superscript - answer-subtract eIsotope - answer-Diff number of neutrons Isomer - answer-two or more compounds with the same # of elements but dif structural shape and properties Allotrope - answer-Dif physical form an element can exist (example carbon = graphite- charcoal- diamondBeta Particle - answer-Electron from radioactive decay (one negative charge) Alpha Particle - answer-two protons and two neutrons bonded together (two units with positive charge) Gold Foil Experience - answer-Rutherford discovered that some alpha particles were scattered at large angles. Conclusion was that most mass of the mass and all of the positive charge had to be concentrated in a tiny fraction of volume of atom. the rest of the atom had to be mostly empty space. Name Labe of Electron configuration 1s^1 - answer-1= energy level s= type of orbital ^1= # of E in orbital Transition Elements Orbital letter - answer-d (five boxes and 10e-) Alkaline Earth Metal - answer-S^2 (1 box and 2e-) Lanthanides/ anthanitdes - answer-f (7 boxes and 14 Electrons) Alkali Metals - answer-s^1 group 13-18 - answer-p Valance Shell - answer-outer most shell with electrons responsible for bondingPhoton - answer-is a packet of energy, the quantity of which is related to the frequency of the electromagnetic radiation how do photons interact with covalent bonds? - answer-high energy photons such as ultraviolet parts of the electromagnetic spectrum have enough energy to disrupt covalent bonds n - answer-Principle quantum number (Shell, size) l - answer-Angular quantum number (Subshell, s,p,d,f, shape) Formula n-1 ml - answer-Magnetic quantum number (orbital, orientation) -l to +l Each electron in an orbital has its own set of how many quantum numbers - answer-three ms - answer-Electron spin +1/2 or -1/2 l=0 - answer-s l=1 - answer-p l= 2 - answer-d l=3 - answer-fFormula for # of subshells - answer-2l+1 S 0 nodal - answer-orbital and how many nodals p 1 nodal - answer-Orbital and how many nodals d 2 nodal - answer-orbital and how many nodals Hund's Rule - answer-every orbital in sub-shell must be singly occupied before it can be double occupied Pauli Exclusion Principle - answer-No more then two electrons can occupy the same orbital and if two electrons do occupy the orbital they must have opposite spins Para-magnetism: - answer-atoms having unpaired electrons allowing them to be attracted to a magnetic field. and attraction is proportional to the number of unpaired electrons. Dia-magnetic - answer-atoms that do not have any unpaired electrons, they are not attracted to a magnetic field Atomic line spectra provides evidence that the energy state of an electron in an atom is quantized. -- N5-N1 - answer-what is its purpose and largest emission of energy?Energy must be ____________ by the atom for an electron to move from one energy state in an atom to another energy state higher or farther from the nucleus - answer-absorbed energy is ________ by an atom moving from a higher energy level or state to a lower energy level - answer-emitted how many Valance electrons for H - answer-1 how many Ve- for Be - answer-2 How many Ve- for B - answer-3 How many ve- for C - answer-4 how many ve- for N - answer-5 how many ve- for O - answer-6 how many ve- for F - answer-7 how many ve- for He - answer-8 (full octet) copper - answer-[Ar]3d^10 4s^1 Chromium - answer-[Ar]3d^5 4s^1Atomic Properties of elements - answer-similarites are due to valance shell electrons electron configuration Atomic Radii (size) - answer-which trend? Atomic size - answer-which trend? same trend as radii Ionization energy - answer-which trend? Electron Affinity - answer-which trend? Iso-electronic - answer-same electron configuration Ionization energy: - answer-ability to loose an eElectron affinity: - answer-ability to gain an eBonding - answer-forces that keep atoms together molecular structure - answer-ways atoms are arranged Valance Electrons - answer-outer most electrons involved in bonding