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