What is the most current model of how the atom is constructed?
1. a donut shaped cloud of protons surrounding a dense nucleus containing electrons and neutrons
2. a loose collection of protons, neutrons and electrons all mixed up into a sphere
3. a dense nucleus of protons and neutrons surrounded by electron clouds of different shapes and sizes 4.
a miniature solar system with the sun replaced by a dense nucleus made of protons and neutrons, with the electrons orbiting like planets

3. A dense nucleus of protons and neutrons surrounded by electron clouds of different shapes and sizes.

Explanation:

In the nucleus of an atom there are protons an neutrons densely packed together, while the electrons move around this nucleus.

The difference between answer 3. and 4. is that the electrons do not follow an established orbit, like planets do. They are too small and move too quickly for us to precisely determine both their position and their speed, at any given time. This is why they are thought to be electron clouds.

explanation:

two years ago, when picking flowers in the mountains back of yosemite valley, i found a book. it was blotted and storm-beaten; all of its outer pages were mealy and crumbly. the paper seemed to dissolve like the snow beneath which it had been buried, however; many of the inner pages were well preserved. and although all were more or less stained and torn, whole chapters were easily readable. this is the condition of the great open book of yosemite glaciers today; its granite pages have been torn and blurred by the same storms that wasted the castaway book.

two years ago, when picking flowers in the mountains back of yosemite valley; i found a book. it was blotted and storm-beaten, all of its outer pages were mealy and crumbly. the paper seemed to dissolve like the snow beneath which it had been buried, however, many of the inner pages were well preserved. and although all were more or less stained and torn; whole chapters were easily readable. this is the condition of the great open book of yosemite glaciers today, its granite pages have been torn and blurred by the same storms that wasted the castaway book.

d) a person who learns about the world by observing it.

explanation:

scientist are people who discover why and how things are done and made in the world.