The electron configuration "Ra 7s² 5f³" is not valid because it incorrectly places electrons in the 7s subshell for an atom that should not have electrons in that energy level. Radium (Ra), with an atomic number of 88, has its valence electrons in the 7s subshell, but the 5f subshell can only accommodate 14 electrons in elements of the actinide series. The correct configuration for radium is [Rn] 7s², and the 5f subshell is filled in elements like actinium (Ac) and beyond.
r3hk7
No, the scientific method can be uncontrolled to for it to be valid.
a valid investigation is an effective investigation i think. The results turn out to be what you had inferred.
newtons laws are always valid in non inertial frames
Sorry but your question doesn't make sense... You have to know what the hypothesis is to test if your question is valid.
The electron configuration of uranium is: [Rn]5f36d17s2.
The electron Configuration [Ra] 7s2 5f8 is Not Valid because Ra is basically [Rn] 7s2. However, you have Ra 7s2 5f8. You can never repeat and electron configuration piece twice, or at all.
The electron configuration for uranium is Rn 5f3 6d1 7s2.
The electron configuration of uranium is Rn 5f3 6d1 7s2.
It is the f sublevel. Uranium has the configuration [Rn] 5f3 6d1 7s2.
[Rn]7s2
The noble gas configuration for uranium is [Rn] 5f3 6d1 7s2. This means that the electron configuration for uranium can be shortened to make it like a noble gas (radon) by including the noble gas before uranium in square brackets.
Ra, radium
Electron configuration of uranium: 5f3 6d1 7s2 See also: http://en.wikipedia.org/wiki/Atomic_electron_configuration_table
The electronic configuration of uranium is Rn 5f3 6d1 7s2 because uranium has 92 electrons. Electrons fill up the orbitals with the lowest energy level first (Aufbau principle), and the 5f, 6d, and 7s orbitals are progressively filled in that order for uranium.
Uranium has valences 2, 3, 4, 5, 6.Valence electrons are located on the levels 5f3, 6d1, 7s2.
Uranium atom has 7 electron shells with 2, 8, 18, 32, 21, 29, 2 electrons.The electron configuration is [Rn]5f3 6d1 7s2.