. What is the wavelength (nm) of length emitted
when electron in a hydrogen atom undergoes a
transition energy level, n=4 to n=27. Where n =
109678cm
a. 496.2719
b. 586.2719
c. 386.2719
d. 268.2719
e. 486.2719

In the 1800s, one of the statements in john dalton's atomic theory was that atoms are indivisible. later experimental evidence led to the discovery of subatomic particles such as neutrons, electrons, and protons. what happened to the indivisible atom part of dalton's atomic theory, and why?

The mass of a neutron is equal to the mass of a proton plus the mass of an electron. true or false false true

Consider the following reaction at equilibrium. 2co2 (g) 2co (g) + o2 (g) h° = -514 kj le châtelier's principle predicts that the equilibrium partial pressure of co (g) can be maximized by carrying out the reaction a. at high temperature and high pressure b. at high temperature and low pressure c. at low temperature and low pressure d. at low temperature and high pressure e. in the presence of solid carbon