Answer:
3 electrons
Explanation:
For every proton there is an electron.
12) Solubility
Solubility is the ability to be dissolved, especially in water.
Answer : The value of is,
Explanation :
First we have to calculate the solubility in mole/L.
The balanced equilibrium reaction will be,
The expression for solubility constant for this reaction will be,
Now put the value of solubility in this expression, we get the of barium carbonate.
Therefore, the value of is,
Answer:
The atomic radius of atoms generally decreases from left to right across a period. There are some small exceptions, such as the oxygen radius being slightly greater than the nitrogen radius. Within a period, protons are added to the nucleus as electrons are being added to the same principal energy level.
hope this helps!