A) vaporization B) a stable electron configuration C) an exchange of energy D) an exchange of energy
A) more electrons than either protons or neutrons. B) an even number of electrons C) an outermost energy level that is full of electrons D) an equal number of protons and electrons.
A) the nucleus and all electrons. B) the nucleus and all non-valence electrons. C) the nucleus. D) the nucleus and valence electrons
A) transfer of electrons. B) transfer of protons. C) sharing of electrons. D) transfer of neutrons.
A) four different cations B) two inner energy levels. C) four valence electrons. D) no protons in its nucleus.
A) electric currents. B) physical bonds. C) chemical bonds. D) nuclear forces.
A) ions with opposite charges B) one atom’s nucleus and another atom’s electrons. C) atoms with neutral charges D) the electrons of two different atoms
A) there are two magnesium ions for each ion of chlorine B) there are two chloride ions for each magnesium ion. C) the chloride ion is twice the size of the magnesium ion. D) magnesium and chlorine form a double covalent bond.
A) two atoms of chlorine B) one atom of oxygen. C) two atoms of oxygen. D) one atom of chlorine.
A) are positively charged. B) contain metallic elements C) contain charged ions that are locked tightly together D) are made of elements that are solid at room temperature.
A) SO3 B) NN C) OO D) O3
A) alkaline earth metals B) halogens. C) alkali metals. D) transition metals.
A) fluorine lithide B) fluorine lithium C) lithium fluoride D) lithium fluorine
A) two types of iron ions. B) iron ions with a 2+ charge. C) iron ions with a negative charge. D) iron ions with an 11+ charge.
A) group number B) atomic number C) atomic mass D) period
A) BeCl2 B) Be2Cl C) 2BeCl D) Be2Cl2
A) two oxygen atoms B) a polyatomic ion C) an ionic bond D) two carbon atoms
A) the lattice that forms contains anions and cations B) electrons are shared between atoms C) electrons are transferred between atoms D) there is an attraction between positively charged and negatively charged particles
A) NaCl and H2O B) HCl and NaCl C) NaOH and HCl D) NaOH and H2O
A) Na + Br2 2NaBr B) 2Na + Br2 NaBr C) Na + Br2 NaBr D) 2Na + Br2 2NaBr
A) CH4 + O H2O + CO2 B) CH4 + 2O2 2H2O + CO2 C) CH4 + 4O 2H2O + CO2 D) CH4 + O2 H2O + CO2
A) Electrons are both gained and lost B) Electrons are lost only C) Electrons are neither gained nor lost D) Electrons are gained only
A) It gained electrons and was reduced. B) It lost electrons and was oxidized. C) It gained electrons and was oxidized D) It lost electrons and was reduced.
A) bonds. B) nuclei of the atoms. C) unbonded electrons. D) movement of the electrons.
A) Bonds of the reactants are formed, and bonds of the products are broken. B) The bonds of both the reactants and the products are formed. C) Bonds of the reactants are broken, and bonds of the products are formed. D) The bonds of both the reactants and the products are broken.
A) both endothermic and exothermic B) endothermic C) exothermic D) neither endothermic nor exothermic
A) reaction is conserved. B) reactant is greater than the chemical energy of the products. C) products is greater than the chemical energy of the reactant. D) reactant and the chemical energy of the products are equal |