What does the sum of the core electrons and valence electrons equals?

Enveloped by mantle-core boundary, the outer core might not be spherical. Propagation of seismic waves, partly with reflection, marks the separation between mantle and outer core. Only primary waves enter....

For $B$, $Z=5$, i.e. its nucleus contains 5 protons, 5 positively charged, massive particles. And if there 5 protons, the neutral atom has 5 electrons conceived to whiz about the...

for discussion on atomic radii of the transition metals.

Nitrogen is in Group V. It has 5 . Do I win £5-00?

Group 2 has two valance electrons. Group 18 would have 8 valance electrons. ( The 10 d electrons will drop down into the next lower shell and are...

This may seem a bit confusing when one looks at , since chlorine is the seventh element in its row, but iodine is the seventeenth. However, in the case of...

All atoms strive for stability. The optima electron configuration is the electron configuration of the VIII A family or inert gases. Look at the electron configuration of the nonmetal...

In terms of actual , there is literally only one example. You can consider that their oxidation states have never gotten higher than $+8$, except for Iridium: In terms...

For the main group (representative) , the are the outermost (highest energy) $"s"$ and $"p"$ electrons, which make up the valence shell. The participate in chemical reactions. The main group...

And the zinc cation is $Zn^(2+)$. When the ions form a salt, clearly they form an electrically neutral species; and thus the formulation of the salt is $Zn_3P_2$. Each phosphorus...