The answer is same atomic number!
Answer:
The answer to your question is: The second option.
Explanation:
Atoms are stable when they gain or lose electrons to have 8 electrons.
They have one valence electron. Noble gases have 8 electrons, not one, If they would have 1 electron they would be extremely reactive.
They have eight valence electrons. This is the right answer, noble gases have 8 electrons that is why they are unreactive.
They have seven valence electrons. If noble gases would have 7 electrons, they would be very reactive.
They have two valence electrons. This option is incorrect, elements that have 2 electrons are reactive like Calcium, Magnesium, etc.
Answer:
Yes we can calculate the solubility
The solubility of the mineral is 120 g/L
Explanation:
We have the information that the sample taken originally from the rock pool is 25.0 mL
So,
25.0 mL of the sample contained 3.000 g of the sample
10000mL of the sample now contains 1000 * 3.000/25 = 120 g
This means that 120 g of the sample dissolves in 1000mL or 1L of solution.
Therefore, the solubility of the mineral is 120 g/L
Electrons in the outermost shell of a given element are - valence electrons, it is their (the valence electrons) interactions that determine the chemical properties of an element.
