Pseudophryne. The corroboree frog is incredibly distinctive with its bright yellow and black striped skin. The upper surface has a rough texture whilst the belly is smooth and either black and yellow or black and white.Females are larger in size than males and, unusually, neither sex has webbed toes.seudophryne. The corroboree frog is incredibly distinctive with its bright yellow and black striped skin. The upper surface has a rough texture whilst the belly is smooth and either black and yellow or black and white.
(b) P4 is non polar covalent. (c) BF3 is non polar covalent molecule (individual B-F bonds are polar but the net dipole moment is zero due to its triangular planar geometry).b) P4 is non polar covalent. (c) BF3 is non polar covalent molecule (individual B-F bonds are polar but the net dipole moment is zero due to its triangular planar geometry).
So all in all, there are 6 electrons that are involve in the bonding (3 bonding pairs) and 2 electrons that are non-bonding (1 non-bonding pair) since the two of its valence electrons did not pair up to form a bond. Carbon on the other hand has 4 valence electrons coming from Group IVA and thus will need four electrons more to have an 8. Each of these 4 valence electrons will pair up with an incoming. atom to form 4 bonds and consequently will have four bonding pairs and none non-bonding pair.