An atom has a mass number of 24 and 13 neutrons. What is the atomic number of this atom? Express

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?