Elle wanted to test how temperature affects the rate of evaporation. she had three setups: setup 1: elle placed a container with 1 cup of water at room temperature (25°c). setup 2: elle placed a container with 1 cup of water in a warm room (45°c). setup 3: elle placed a container with 1 cup of water in a cold room (0°c). what factor did elle control?

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.

The nuclear fission process releases neutrons and question 27 options: alpha particles electrons energy beta particles

What shape would a molecule with two bound groups and two lone pairs have?