Suppose that a flask has some vinegar in it and a balloon has some baking soda in it. Next, the balloon is fit over the flask and the baking soda is dumped in. There is fizzing and the balloon fills as gas is produced. The balloon keeps any gas from escaping. If the initial mass of all parts combined is found to be 100g, what should the mass be of all parts after the reaction is complete? a
101
b
98
c
100
d
99

2. how is heavy water different from normal water

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.

Which element would mostly likely have an electron affinity measuring closest to zero