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).
1 The CH 3 - Lewis structure has a total of 8 valence electrons. 2  This includes the electron represented by the negative charge in CH 3 3  - . You need to put brackets around the CH 3 - Lewis structure as well as a negative charge to show that the structure is a negative ion. If you calculate the formal charges for CH 3 - you'll find that the Carbon (C) has a -1 charge and the Hydrogen (H) atoms each have a formal charge of zero. 2  This gives the entire structure a -1 charge (remember it's CH 3 -).