Which statement is not true of bohr's model of the atom?
a. bohr's model correctly described the atomic spectra of h and he but failed for other atoms.
b. an electron does not radiate energy while in a stationary state.
c. an electron can move to a different orbit only by absorbing or emitting a photon.
d. the energy of a photon absorbed or emitted by an electron is equal to the difference between two energy states.
e. electrons in stationary states in the bohr hydrogen atom occupied circular orbits.

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

What rule is used to determine how many covalent bonds an element can form? a. the number of covalent bonds is equal to six c the number of covalent bonds is equal to five minus the group number plus the group number b. the number of covalent bonds is equal to eight d. none of the above minus the group number select the best answer from the choices provided

Answer asap need to be answered by wednesday morning explain how a buffer works, using an ethanoic acid / sodium ethanoate system including how the system resists changes in ph upon addition of a small amount of base and upon addition of a small amount of acid respectively. include the following calculations in your i. calculate the ph of a solution made by mixing 25cm3 0.1m ch3cooh and 40cm3 0.1m ch3coo-na+. [ka = 1.74 x 10-5 m] ii. calculate the ph following the addition of a 10cm3 portion of 0.08 m naoh to 500cm3 of this buffer solution. iii. calculate the ph following the addition of a 10cm3 portion of 0.08 m hcl to 200cm3 of the original buffer solution.