Lattice energy is a. the energy required to convert a mole of ionic solid into its constituent ions in the gas phase b. the sum of ionization energies of the components in an ionic solid c. the sum of electron affinities of the components in an ionic solid d. the energy required to produce one mole of an ionic compound from its constituent elements in their standard states e. the energy given off when gaseous ions combine to form one mole of an ionic solid

Smog is the term used to describe the combination of fog and smoke

The atomic radius of sodium is 186 pm and of chlorine is 100 pm. the ionic radius for na+ is 102 pm and for cl– is 181 pm. in going from na to cl in period 3, why does the atomic radius decrease while the ionic radius increases? a. the inner electrons in the sodium cation shield its valence electrons more effectively than the inner electrons in the chloride anion do. b. the inner electrons shield the valence electrons more effectively in the chlorine atom than in the chloride anion. c. the outermost electrons in chloride experience a smaller effective nuclear charge than those in the sodium cation do. d. the outermost electrons in chloride experience a larger effective nuclear charge than those in the sodium cation do. e. monatomic ions are bigger than the atoms from which they are formed.

Apiece of copper has a temperature of 75.6 0c. when the metal is placed in 100.0 grams of water at 19.1 0c, the temperature rises by 5.5 0c. what is the mass of the metal?