NY Regents Chemistry Chemical Bonding and Molecular Geometry — practice questions
26 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice NY Regents Chemistry Chemical Bonding and Molecular Geometry in the app →A neutral atom loses two electrons from its valence shell. What has it become?What force holds the ions of a salt crystal together?Solid sodium chloride will not conduct electricity, but molten sodium chloride does. What changes on melting?An ionic compound is built from Al3+ cations and O2- anions. Which ratio of ions leaves the compound neutral?How much energy is needed to pull one mole of solid sodium chloride apart into gaseous ions?A calcium atom loses both of its valence electrons. Its 18 remaining electrons match which noble gas?Aluminum sits in group 13 of the periodic table. What charge does its common cation carry?Iron has the ground state configuration [Ar]3d6 4s2. Which electrons leave first when the Fe2+ ion forms?Two atoms have very similar tendencies to attract electrons. Which bond do they form with each other?How do the melting points of covalent compounds compare with those of ionic compounds?Two hydrogen atoms approach each other and form a bond. What fixes the bond length?Breaking the bonds in one mole of hydrogen molecules takes 436 kJ. What happens when one mole of H2 forms fromIn a chlorine molecule the two bonded atoms are identical. How are the bonding electrons shared?In a molecule of hydrogen chloride, which atom carries the partial negative charge?Which element attracts the electrons in its bonds more strongly than any other element?A bond forms between a metal atom and a nonmetal atom. What character does that bond usually have?Potassium nitrate is built from K+ ions and NO3- ions. Which bond types are present in the solid?Hydrogen does not obey the octet rule. How many electrons fill its valence shell?Two atoms share two pairs of electrons between them. What is that bond called?You are drawing a Lewis structure for a molecule with several atoms. Which atom normally goes in the center?Nitric oxide has 11 valence electrons in total. What does that odd count tell you before you draw anything?How does a carbon to carbon triple bond compare with a carbon to carbon single bond?Breaking all four carbon to hydrogen bonds in one mole of methane takes 1660 kJ. What is the average bond enerHydrogen reacts with chlorine to give hydrogen chloride. Bond energies are 436 kJ for H to H, 243 kJ for Cl toAmmonia has three bonds and one lone pair around its nitrogen atom. What is the shape of the molecule?Carbon dioxide contains two polar carbon to oxygen bonds, yet the whole molecule is nonpolar. Why?