Answer:
The same element that contain equal number if protons but different number of neurons in their nuclei and hence differ in relative atomic mass
Pluto
Because it has not cleared the neighborhood around its orbit, Pluto is considered a dwarf planet. It orbits in a disc-like zone beyond the orbit of Neptune called the Kuiper belt, a distant region populated with frozen bodies left over from the solar system's formation.
Answer:
proton pump
Explanation:
There are four major respiratory enzyme complexes that make the electron transport chain. These complexes are complex I, II, III, IV. All these complexes collectively act as proton pump and remove the H+ from the matrix o mitochondria and pump it into intermembrane space against the concentration gradient.
This generated an electrochemical gradient between the mitochondrial matrix and intermembrane space. So when these H+ comes back in the mitochondrial matrix through ATP synthase it generates ATP from ADP. Therefore the correct answer is a proton pump.
Elements with three p-electrons....
That would be N, P, As, Sb, and Bi -- elements in group 15
For example, energy diagram showing "empty" orbitals up through the 3p.
.....3p __ __ __
3s __
.....2p __ __ __
2s __
1s __
Energy diagram of phosphorous showing three unpaired electrons in 3p-sublevel
.....3p ↑_ ↑_ ↑_
3s ↑↓
.....2p ↑↓ ↑↓ ↑↓
2s ↑↓
1s ↑↓
According to Hund's rule, the electrons singly occupy the p-orbitals, and all have the same spin.