1)Na and O - ion bond
2)K and F - ion bond
3)Ne and O - no bond (as Ne is a noble gas)
And by elimination, your answer is 4)
Answer:
b) The acidic conditions break down foods directly.
c) It allows for the activation of pepsinogen into pepsin.
Explanation:
The acid inactivates all the enzymes in the food, and begins its own function of breaking down what is left of the food in combination with the enzyme pepsin. Finally, this nutrient rich food concentrate moves in the small intestine. There the acid is neutralized and enzymes produced by the pancreas are reintroduced to complete the process.
The inner core us the densest