ACS Gen Chem 1 Exam Questions and Correct Answers Latest Version (2024-2025)
Extensive Property - Answers Values that depend on how much you have
Intensive property - Answers Independent of size sample
Density - Answers Mass/volume
Homogeneous mixture - Answers Same throughout, indistinguishable parts
Heterogeneous - Answers Different parts, distinguishable parts
Diatomic elements - Answers N2, O2, H2, Cl2, Br2, I2
John dalton - Answers Founded the atomic theory
Thompson experiment - Answers Determine charge to mass ratio based on deflection or attraction of
particles
Rutherford experiment - Answers Particles shot through gold foil, atoms are mostly empty space
Millikan experiment - Answers Determined the magnitude of the charge on a single electron
Kinetic energy - Answers Energy of moving things
Potential energy - Answers Stored energy
Bohr model correct? - Answers No! It is fundamentally incorrect
Lattice energy stability - Answers The higher the charge the more stable it is if it is cancelled out by
another charge in the molecule
Atom - Answers Smallest piece of matter still discernible as a particular element
Element - Answers A specific kind of atom defined by the number of protons in the nucleus
Molecule - Answers Combo of two or more atoms
Isotope - Answers A particular atom of an element with potentially varying numbers of neutrons
Ion - Answers A once electrically neutral atom which has been changed by loss or gain of electrons
Anion - Answers Negative ion
Cation - Answers Positive ion
Identifying an element - Answers Protons=atomic number
Electrons=atomic number
, Neutrons=atomic mass minus number of protons
Avogadro's number - Answers 6.022x10^23
Salts - Answers Ionic, metal and a non metal
Strong acids - Answers HCl, HBr, HI, HNO3, H2SO4, HClO4, HClO3
Ionic bonds - Answers MUST have a metal
Covalent bonds - Answers MUST have a poly atomic ion
Bond energy - Answers Energy needed to break a bond
Ionic bond (term) - Answers Negative and positive ions bond together to form a molecule
Covalent bond (term) - Answers Sharing of electrons
Polar covalent bond - Answers Bond between two different atoms with different electro negativity
Nonpolar covalent bond - Answers Bond between two atoms that are the same with the same
electronegativity
Isoelectronic series - Answers Ions with the same number of electrons
Exothermic - Answers Negative
Endothermic - Answers Positive
Linear angle - Answers 180
Trigonal planar angle - Answers 120
Tetrahedral angle - Answers 109.5
Trigonal bipyramidal - Answers 90, 120
Octahedral angle - Answers 90
Louis de Broglic - Answers Particles can have wave nature in a way analogous to how EM waves have
particle nature
Quantum Numbers - Answers L= 0,1,2,3,4...
N= L+1
Ml= -L...+L (not zero)
Mchange= 1/2 or -1/2
Extensive Property - Answers Values that depend on how much you have
Intensive property - Answers Independent of size sample
Density - Answers Mass/volume
Homogeneous mixture - Answers Same throughout, indistinguishable parts
Heterogeneous - Answers Different parts, distinguishable parts
Diatomic elements - Answers N2, O2, H2, Cl2, Br2, I2
John dalton - Answers Founded the atomic theory
Thompson experiment - Answers Determine charge to mass ratio based on deflection or attraction of
particles
Rutherford experiment - Answers Particles shot through gold foil, atoms are mostly empty space
Millikan experiment - Answers Determined the magnitude of the charge on a single electron
Kinetic energy - Answers Energy of moving things
Potential energy - Answers Stored energy
Bohr model correct? - Answers No! It is fundamentally incorrect
Lattice energy stability - Answers The higher the charge the more stable it is if it is cancelled out by
another charge in the molecule
Atom - Answers Smallest piece of matter still discernible as a particular element
Element - Answers A specific kind of atom defined by the number of protons in the nucleus
Molecule - Answers Combo of two or more atoms
Isotope - Answers A particular atom of an element with potentially varying numbers of neutrons
Ion - Answers A once electrically neutral atom which has been changed by loss or gain of electrons
Anion - Answers Negative ion
Cation - Answers Positive ion
Identifying an element - Answers Protons=atomic number
Electrons=atomic number
, Neutrons=atomic mass minus number of protons
Avogadro's number - Answers 6.022x10^23
Salts - Answers Ionic, metal and a non metal
Strong acids - Answers HCl, HBr, HI, HNO3, H2SO4, HClO4, HClO3
Ionic bonds - Answers MUST have a metal
Covalent bonds - Answers MUST have a poly atomic ion
Bond energy - Answers Energy needed to break a bond
Ionic bond (term) - Answers Negative and positive ions bond together to form a molecule
Covalent bond (term) - Answers Sharing of electrons
Polar covalent bond - Answers Bond between two different atoms with different electro negativity
Nonpolar covalent bond - Answers Bond between two atoms that are the same with the same
electronegativity
Isoelectronic series - Answers Ions with the same number of electrons
Exothermic - Answers Negative
Endothermic - Answers Positive
Linear angle - Answers 180
Trigonal planar angle - Answers 120
Tetrahedral angle - Answers 109.5
Trigonal bipyramidal - Answers 90, 120
Octahedral angle - Answers 90
Louis de Broglic - Answers Particles can have wave nature in a way analogous to how EM waves have
particle nature
Quantum Numbers - Answers L= 0,1,2,3,4...
N= L+1
Ml= -L...+L (not zero)
Mchange= 1/2 or -1/2
