The Bohr model of the atom suggest that the protons and neutrons are found in the nucleus and the electrons orbit the nucleus much like planets around the sun. How is our modern model of the atom different from this model? A) Neutrons are not found in the nucleus. B) The nucleus is much larger than first thought. C) The electrons contain smaller parts called quarks. D) The electrons move around the nucleus in an electron cloud

I think it is D

Explanation:

the Bohr model says that electrons whizz around the atomic nucleus in the same way that the earth goes around the sun - but rather than being bound by gravity, it is bound by electromagnetic forces.

the diagram which shows forces as either balanced = same speed or unbalanced = accelerarting

d

explanation:

v=uf/(u-f)

= 5.10/(5-10) convex lens has positive focal length

=50/-5

=-10 cm (formed at other side)