Answer:
2/3
Explanation:
Crystals structures can also be seen when two elements combines together and the perfect example is Al₂O₃ which is given in the question above. Just like it is given in the question above, the kind of arrangement in the crystal structure for Al₂O₃ is called HCP which stands for Hexagonally Closed Pack.
The aluminum ions which is in form of Al³⁺ occupies the two-third[2/3] positions while the position that the oxygen ion occupies is one[1].
Answer is: no, every sample does not have a negative charge.
Beside negatively charged electrons, atoms have positively charged protons, so atoms have neutral charge.
Atomic number is the number of protons, which is characteristic of a chemical element. For example, iron (Fe) is an element with atomic number 26, which means it has 26 protons and 26 electrons (in neutral atom, number of protons is equal to number of electrons).
The electron (symbol: e⁻) is a subatomic particle whose electric charge is negative one elementary charge.
Proton is a subatomic particle with a positive electric charge of +1e elementary charge.
Explanation:
It depends on Mass and Height above ground.
P.E. - mgh
Mark me BrAinLieST.