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CL4 questions


How do you find the number of valence electrons? Look at its group number.
How are cations formed? When an atom loses one or more valence electrons.
How are anions formed? When an atom gains one or more valence electrons.
What is the electrical charge of an ionic compound? electrically neutral
What are the properties of ionic compounds? conduct electricity, electrostatic, melt at high boiling points
How can you model the valence electrons of metal atoms? As a sea of electrons. Valence electrons are mobile and can freely move from one part of the metal to another.
Why are alloys important? Their properties are often in larger portion ( superior) to their components elements
What information does a molecular formula produce? Shows how many atoms of each element a substance contains.
What representative units define molecular and ionic compounds? Molecule, formula unit
What is the result of electron sharing in covalent bonds? Atoms attain electron configurations of noble gases.
What are some exceptions to the octet rule? If number of valence electrons is an odd number. Molecules that have less or more than a complete octet. Atoms form double or triple covalent bonds if they can attain a noble gas by sharing two or three pairs of electrons.
How are coordinate covalent bonds different from other covalent bonds? In a coordinate covalent bond, the shared electron pair comes from one of the bonding atoms.
How do electronegativity values determine the charge distribution in a polar bond? The more electronegative atoms attracts electrons more strongly and gains a slightly negative charge. The less- electronegative atom has a slightly positive charge.
How the strenghts of intermolecular attractions compare with the strengths of ionic and covalent bonds? Intermolecular attractions are weaker than either ionic or covalent bonds.
Why are the properties of covalent compounds diverse? Widely varying intermolecular attractions.
Created by: TJ365