Which phrase best describes a covalent bond between two atoms?
A) a stable arrangement of charged atoms held together by electrostatic forces
B) a stable arrangement of atoms made by sharing two electrons between adjacent atoms
C) uncommon, as electrons are free to jump from one atom to another
D) an exchange of nuclei between two atoms
Question 2
What is the difference between a kilowatt and a kilowatt hour? Which is a quantity of energy? Which is a measurement of available power?
A) A kilowatt is measure of force. A kilowatt hour is a measure of energy. Therefore a kilowatt hour is a measurement of available power.
B) A kilowatt is a measure of force per unit area and therefore a measurement of energy. A kilowatt hour is a measure of available power, metered on your electric bill.
C) A kilowatt is a measurement of the rate at which energy is delivered, which is power. A kilowatt hour is an amount of energy, which is metered on your electric bill.
D) A kilowatt is a measure of force while a kilowatt hour is a measure of energy flow. Neither is a measure of available power. Available power is the term used by the power company for its output potential.
Electrostatic interactions of oppositely charged ions of salt
An antiparallel arrangement of strands forming b-sheets
Cleavage of a glycosidic bond by hydrolysis or Phosphorolysis
Covalent Bonds رابطة تساهمية
Peptide bond formation between two amino acids, resulting from a dehydration reaction
What is the isotopic atomic mass of an isotope if 9.7023 1022 atoms weighs 4.0256 g?