UCE (O-Level) Atomic combinations — practice questions
8 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice UCE (O-Level) Atomic combinations in the app →How is a covalent bond between two atoms formed?What name is given to the electrons in the outermost energy level of an atom?An oxygen atom in a water molecule keeps two electron pairs entirely to itself. What are these pairs called?In a dative covalent bond, where do the two shared electrons come from?What does the electronegativity of an element measure?According to VSEPR theory, how do the valence electron pairs around a central atom arrange themselves?Bond energy is the amount of energy needed to do what?A molecule has one end with a slightly positive charge and the other end with a slightly negative charge. What