Helpp me please and provide an explanation :( A student is asked to measure out 25.0 mL of water. Which of the following pieces of lab equipment should the student use to measure out the water: a 100 mL beaker, a 100 mL volumetric flask, or a 100 mL graduated cylinder? Explain.

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.

What can be found in the ionosphere

What best discribes the relationship between wavelength and frequency in a electromagnetic wave