The transition state of an enzyme- catalysed reaction that converts a substrate to a product a) is a transient intermediate formed along the reaction coordinate of the reaction b) has higher free-energy than either the substrates or products c) is the most populated species along the reaction coordinate d) is increased in concentration because the enzyme binds tightly to it e) determines the velocity of the reaction select one: a. a, b, d and e b. a and c c. a only d. d and e e. a, b, c and e

there all right good

explanation:

the answer for sodium is 0.186

the answer for rubidium is 0.251

explanation:

let the different atoms be x and y. each with four protons and same mass will be represented as follows.

mass number is number of protons + number of neutrons.

            and  

since, it is given that one has a negative charge while the other is neutral. therefore, there will be increase in number of protons and the atom will be represented as follows.

according to periodic table, mass number of beryllium is 9 and it has atomic number 4 so, the atoms will be and .  

the protons and neutrons will be located inside the nucleus whereas the electrons will be revolving around the nucleus.  

it's all four options.