The carton of milk in your refrigerator contains 20 cells per glass of a strain of e. coli which makes people sick. this strain doubles every 2 days, and your immune system can destroy up to 1000 cells per glass without noticeable effects. (a) when should the carton of milk be poured down the drain? (b) at room temperature this strain doubles every 8 h. for how long is the milk drinkable if left on the counter?

As you move from right to left on the periodic table the atomic radius fill in the blank

Select the correct answer. which statement is true about a polarized object? o a. it gains electrons and becomes negatively charged. ob. it gains protons and becomes positively charged. oc. the number of positive and negative charges can be the same. od. it has to be a metal. o e. there is no change in the distribution of the charge in the object. reset next what

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.