Answer:According to the valence bond theory, the chemical bond is defined as the interaction of half-filled. atomic or hybrid orbitals
Explanation:
Answer is: selenium (Se).
1) electron configuration: ₃₄Se 1s²2s²2p⁶3s²3p⁶3d¹⁰4s²4sp⁴.
2) ₃₃As 1s²2s²2p⁶3s²3p⁶3d¹⁰4s²4sp³.
3) ₃₆Kr 1s²2s²2p⁶3s²3p⁶3d¹⁰4s²4sp⁶.
4) ₃₁Ga 1s²2s²2p⁶3s²3p⁶3d¹⁰4s²4sp¹.
Valence electrons of selenium are 4s²4sp⁴.
Search Results<span>Based on temperature changes, the Earth's atmosphere is divided into four layers, as shown in Figure 3. These layers are the troposphere, stratosphere, meso sphere, and thermosphere. Although these words might sound complicated, the name of each layer gives you clues about its features.</span>
It is graphical representation of the solubity of a particular solute in a given solvent with respect to varying temperatures,generally,temperature is directly porportional to solubity,as temperature increases solubity increases.