Uncertainty in Measurement (Section)
(a) The diameter of Earth at the equator is 7926.381 mi. Round this number to three significant figures and express it in standard exponential notation, (b) The circumference of Earth through the poles is 40,008 km. Round this number to four significant figures and express it in standard exponential notation.
Chapter Five Compounds→ When two or more elements combine, the new substance has different properties than the elements that formed the compound. Covalent Bond→ Formed between two nonmetals. Electrons are S HARED instead of transferred. Ionic Bond→ Bond between metal and nonmetal. Solid state is a lattice of alternating cations and anions. Chemical Formula→ Indicates the number of atoms in each molecule Ex) CO 2 Emp irical Formula → Gives relative number of atoms in a molecule St ructural Formula→ Uses lines to show covalent bonds L wis Dot Structures→ The dots represent the valence electron’s. Shows depiction of the
