Positive ions differ from neutral atoms in that

a)
positive ions have lost protons.

b)
positive ions have gained protons.

c)
positive ions have lost electrons.
eliminate

d)
positive ions have gained electrons.

The answer is C.

Explanation:

An ion is unlike a neutral atom in the fact that it has a charge. Because electrons are negatively charged, an atom becomes more positive if electrons are lost.

the best answer for these questions would be:

1.            c. is smaller

2.            d) concrete operational

3.            b) interaction with the environment – the children interact with their environment can them learn more.

4.            a) parents who reason openly with children can limit a child’s cognitive ability.