How the Valency of carbon is 4?
The outer electronic configuration of carbon is 2s22p2. Thus, it has 4 valence electrons. It shares these 4 valence electrons to form 4 covalent bonds. Hence, valency of carbon is 4.
What is Group 15 in the periodic table called?
Nitrogen group element
Which order of ionization energy is correct?
The correct order of first ionization energy should be: K < Na < Li. 2) Be > Mg > Ca : Correct. These are 2nd group elements and the order correctly reflects trend in ionization energy.
Which one will have the highest 2nd ionisation energy?
The element with electronic configuration 1s22s22p63s1 will have highest second ionization enthalpy.
Which atom has the lowest second ionization energy?
Answer. It is because of the shielding effect that the ionization energy decreases from top to bottom within a group. From this trend, Cesium is said to have the lowest ionization energy and Fluorine is said to have the highest ionization energy (with the exception of Helium and Neon).
Which element has the highest second ionization energy Li be BK?
We notice three things: Li has the highest IE2 , because to remove the second electron we must break the stable 1s2 noble gas shell.
Why lithium has higher second ionization energy than beryllium?
It is because beryllium have two electrons in its valance shell and lithium have only one electron in its valance shell because of this in the first ionisation energy lithium will remove the electron and will achieve noble gas configuration while beryllium on leaving one electron will have one electron in its valance …
Why is the second ionization energy of sodium so high?
The reason the second ionization energy is higher than the first relates to the attraction between the electrons and the nucleus. When one attempts to remove a second electron from a positive ion, there is more attraction between the electrons and the nucleus due to the extra proton.
Does Al or in have a higher ionization energy?
The valence electrons are therefore held more tightly, the atom decreases in size (see atomic radius), and it becomes increasingly difficult to remove them, corresponding to a higher value for the first ionization energy….Periodic Trends — Ionization Energy.
| 3A | Al 577 |
|---|---|
| 4A | Si 786 |
| 5A | P 1012 |
| 6A | S 1000 |