The number of valence electrons of an element can be determined by the periodic table group (vertical column) in which the element is categorized
Answer:
The relative electronegativity of the two bonded atoms determines the polarity of a bond. If the difference in electronegativities between the two atoms is less than 0.4, the bond is nonpolar covalent. ... If the difference in electronegativities between the two atoms is more than 2.0, the bond is ionic.
Thermic refers to heat and exo means outside so ...
They originated from cetral asia, but the americans brought them over.
I think its carbon containing compounds