Answer:
Option B - 2
Explanation:
In Crystal lattices, there are different types of unit cells namely;
- Hexagonal Closest Packed (HCP)
- Face Centred Cubic (FCC)
- Body Centred Cubic (BCC)
- Simple Centred Cubic (SC)
Now, each of them have a coordination number and also number of atoms per unit cell.
For this question, we are restricted to the body-centered cubic (bcc) unit cell which has a coordination number of 8 and contains 2 atoms per unit cell.
Answer:
The Flow of science keeps going because not everything is fully discovered yet. New things are discovered everyday and are also made better as well.
Explanation:
The answer is (2) increases. The definition of excited state is that the electrons have higher energy than ground state. For comprehension, the excited state is ready for reaction so it has higher energy.
Answer:
Kindly check explanation section.
Explanation:
Since, the question requires the chemical reaction to be written in lewis for the the processes involved in this particular Question/problem that is to say the neutralization process and the decomposition process. The lewis structure is given in the attached picture.
For the first process; Sodium bicarbonate reacts with HCl to produce the carbonic acid and a salt, known as Sodium chloride.
Na2CO3 + 2HCl ----------> 2NaCl + H2CO3.
The second process shows the decomposition of Carbonic acid into carbon dioxide and water.
Calcium can lose 2 electrons hence the +2 charge. Chlorine can gain 1 electron hence the charge -1. when they transfer electrons there is an extra electron remaining this goes to another chlorine atom. That is why the chemical equation is CaCl2. Calcium gives two electrons to two different chlorine atoms.
