Answer:
This depicts an electrolytic cell.
Chemical tests show that it is an alkaline earth metal. (a) The family of alkaline earth metals lies in group II of the periodic table indicating that each member of this family has 2 valence electrons. This therefore implies that the new element must also have only 2 electrons in its outermost orbit.
The energy of an electron can be change only by set amounts.
The electrons in an energy level of an atom can only move to a higher or lower energy level only if it absorbs or emits a certain amount of energy. If the electron does not have enough energy to move to the next energy level then it will never move.
Answer:
The answer is: 22, 4 liters
Explanation:
We use the formula PV=nRT
At STP: 1 atm of pressure and 273 K of temperature.
PV=nRT
V=nRT/P =1 mol x 0,082 l atm/L mol x 273 K /1 atm
V=22, 386 l
I think it’s A
because if the pH is lower than 7 than it is acidic