Answer:
trigonal pyramidal
Explanation:
In NF3, the nitrogen atom is sp3 hybridized. Now we must remember that according to the VSEPR theory, the number of electron pairs in the valence shell of the central atom in a molecule determines its shape.
Here, the nitrogen atom is the central atom and its outermost shell is surrounded by four electron pairs - one lone pair and three bond pairs. This means that it has a tetrahedral electron pair geometry.
However, due to the lone pair, the three fluorine atoms are arranged in a trigonal pyramidal geometry. Hence the correct shape of the molecule is trigonal pyramidal.
14N and 15 N is the pairs that are isotope of each other.This is because isotope is are different kind of atoms of the same element which have same number of protons(atomic number) but different number neutrons and different mass number. 14N and 15N are isotope of nitrogen since has different neutron.
Answer : The correct option is, B) 200 N to the left
Explanation :
If the two forces are acting on an object in the opposite directions and they do not exactly cancel each other then the net force is calculated by the difference in the forces.
The force act on an object in the left side are greater than the right side. So, the net force is 200 N to the left.
Therefore, the correct option is, B) 200 N to the left