IEB Matric Chemical Bonding — practice questions
22 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice IEB Matric Chemical Bonding in the app →Sodium hands an electron to chlorine and the two ions then cling together. What holds them is an:A calcium atom loses both valence electrons. The particle left behind carries a positive charge and is called Two chlorine atoms pull on electrons with exactly equal strength, so neither wins the pair outright. The bond Hydrogen bonds to fluorine, which drags the shared electrons much closer to itself. The property that decides The chemist who produced the first electronegativity values, by comparing energies needed to break different bBecause one end of a polar bond is slightly negative and the other slightly positive, the bond acquires a:In a Lewis structure a dash is drawn between two atoms. That dash stands for:Each chlorine atom in Cl2 sits with three lone pairs plus the bonding pair. The number of valence electrons itAn oxygen molecule holds its two atoms together with two shared pairs. Compared with a single bond between theA chemist compares two bonds and finds one needs far more energy to break. That bond is:Two atoms approach until the potential energy of the pair is at its lowest. That separation defines the:Two Lewis structures both look plausible for one molecule. A chemist decides between them by calculating the:A model that arranges electron pairs around a central atom so they get as far apart as possible is:A student measures the angle between two bonds meeting at the same atom. That measurement is the:Beryllium fluoride has just two regions of electron density around the central atom. VSEPR predicts a bond angA central atom carries three regions of electron density and no lone pairs. The geometry and angle are:Ammonia has four electron pairs around nitrogen. Its electron-pair geometry is therefore:Yet ammonia's measured H-N-H angle is a little under 109.5 degrees. The reason is that a lone pair:Water also has four electron pairs on its central atom, but two of them are lone pairs. Its molecular shape isThat distinction matters because the arrangement counting all electron pairs and the arrangement of the atoms A chemist wants to compare how tightly an ionic solid is held together. The quantity to use is the:A student is told to name the arrangement that includes every electron pair around the central atom. That name