List the number of protons neutrons and electrons in each pair of isotopes

grav forces affect all objects magnetic forces affect magnetic objects and electric currents

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.