How many electrons can the third shell (i.e., n=3) hold for an atom?

a why is the radius of K+ so much smaller than the radius of K? O The radius of ion or atom depends only on number of electrons. Thus, radius of K* is smaller than the radius of K. O The radius of a cation is always much smaller than that of the atom from which it is derived. The loss of the 4s electron from K leaves K+ with no electrons in the 72 = 4s shell.

Both questions please 2. 3. S (a) What element has this electronic configuration? 1s²2s²2p63s²3p5 (b) What element has this electronic configuration? 3d 4s (a) Which of the following atoms or ions is diamagnetic? P3- O B3- Cr³+ Ti²+ (b) Which of the following atoms or ions is paramagnetic? C1³+ N3+ Mn7+ VS+ Ne 4p VIGTIG

6 please

Estimate the average energy for valence electrons in a nitrogen N atom. Type your numeric answer and submit (EAv) can be calculated by first multiplying the number of electrons in each of these orbitals (ns and np) by their associated ionization energy (IE, and IE,), and then dividing this result by the total number of valence electrons ( ns +np) in the system: = - ns XIE,+N,×IE, ng+Np E AV ^ use formula to solve for average energy for Nitrogen

In the Brion (in its ground sate), how many electrons are m = 0 and s = of Br is 35. ) What is the effective charge seen by a valence electron in Sc³+? The atomic number of Sc is 21. +? The atomic number

solve this

6) (a) The solubility of carbon tetrachloride (CCI4) in water at 25°C is 1.2 g/L. The solubility of chloroform (CHCI3) at the same temperature is 10.1g/L. Why is chloroform almost 10 times more soluble in water than is carbon tetrachloride? (b) Explain the difference between the Bohr model for the hydrogen atom and the quantum-mechanical model. Is the Bohr model consistent with Heisenberg's uncertainty principle? (Ctrl)

What is the difference between y and y 2 for the electron in a hydrogen atom.

Q4: What is the effective nuclear charge on electrons in a 4s, 5s and 4d for tellurium element (2Те).