What is the group # and period # for cesium

31 Which notations represent different isotopes of the element sodium? (1) 32S and 34S (3) Na + and Nao (2) S2 - and S6 + (4) 22Na and 23Na

What mode of radioactive decay is most likely for the na-20 isotope?

Consider HA2, the intermediate form of a diprotic acid. Ka for this species is 1024 and Kb is 1028. Nonetheless, the Ka and Kb reac - tions proceed to nearly the same extent when NaHA is dissolved in water. Explain.

A cylinder of iron has a mass of 23.45 g. If it is placed on an electronic balance that reports all masses 18.00% too low due to miscalibration, what mass will the balance report for the cylinder of iron?

In a particular genetic cross, the probability of the offspring having a certain traitis 3/4 Which percentage represents this probability? O 25% O 50% O 75% O 100%

What was concluded about the structure of the atom as the result of the gold foil experiment? (1) A positively charged nucleus is surrounded by positively charged particles. (2) A positively charged nucleus is surrounded by mostly empty space.

Andre is predicting the products of chemical reactions. In one reaction, a hydrocarbon is the only reactant. What is the best prediction and explanation of this reaction? Two new compounds form as the hydrocarbon undergoes a synthesis reaction.

What evidence is there that electrons move around in definite pathways around the nucleus? What evidence is there that electrons m

Are greenhouse gases good for us?

How to convert metric units?