Answer:
Explanation:
A = A metal that lost three electrons is Z³⁺
Metals loses their electrons and form cations. So when an metal loses three electrons positive three charge is created.
B= A metal that lost one electrons is Y⁺
When metal loses one electron positive one charge is created.
C=A nonmetal that gained one electrons is X⁻
When non metals gain the electrons anions are formed and negative charge is created on atom due to addition of electron. So when non metal gained one electron -1 charge is created.
D= A nonmetal that gained three electrons is V³⁻.
when non metal gained three electrons -3 charge is created, because of addition of three electrons.
Answer: 
Explanation:
Lattice energy : It is defined energy released when ions combine together in a gaseous phase to form a compound. it is energy possessed by the crystal lattice of a compound. Denoted by symbol 
.
, energy is absorbed while forming of the lattice
, energy is release while forming of the lattice
One mole of sodium ion when combines with one mole chloride ion release 786 kJ of energy.
Answer:
20.27 mol
Explanation:
454 L x (1 mol/22.4 L) = 20.27 mol
Uncertainty of the data hope its help you
Answer:
Three half lives.
Explanation:
Given data:
Number of half lives passed = ?
Amount of parent isotope left = 12.5%
Solution:
At time zero = 100%
At 1st half life = 100%/2 = 50%
At second half life = 50%/2 = 25%
At third half life = 25%/2 = 12.5%
It means three half lives would passed.
