Answer:
2 electrons
Explanation:
Barium is present in group two. It is alkaline earth metal.
It has two valance electrons. In order to achieve noble gas configuration it loses its two valance and get complete octet.
Electronic configuration:
Ba₅₆ = [Xe] 6s²
When it loses two electron it get configuration of xenon.
Chemical properties of barium:
It form salt with halogens.e.g
Ba + Br₂ → BaBr₂
IT react with oxygen and form oxide.
2Ba + O₂ → 2BaO
this oxide form hydroxide when react with water,
BaO + H₂O → Ba(OH)₂
With nitrogen it produced nitride,
3Ba + N₂ → Ba₃N₂
With acid like HCl,
Ba + 2HCl → BaCl₂ + H₂
Answer:
Explanation:
Manganese is the element of group 7 and forth period. The atomic number of Manganese is 25 and the symbol of the element is Mn.
The electronic configuration of the element, manganese is -
To form 
, it will lose 3 electrons from the valence electrons and thus the configuration of the ion is:-
Answer:
C
Explanation:
C shows a mixture of CO2 and H2O, 2 compounds
D.soil
because air gets warm on a hot summers day very easy so does water and concrete but soils tempt. stays cooler during the summer than your other answers.
