(asap) to demonstrate the arrangement of atoms in solids, a teacher tapes off a square section on the classroom floor. how should the students modeling as atoms stand or move in the taped-off section? a. they should leave some vacant space and move around one another. b. a few students should move about holding hands in one half of the space. c. they should all squeeze close together so that there is no vacant space. d. a few students should run randomly in the entire space within the section.

Option (c) is the correct answer.

Explanation:

In a solid, molecules are held together by strong intermolecular forces of attraction. As a result, they are unable to move from their initial place but they can vibrate at their mean position.  

Hence, in solid substances the molecules have low kinetic energy. This means that there is very less space between the molecules of a solid substance.

Whereas in liquids, the molecules are held by less strong intermolecular forces of attraction as compared to solids. Due to which they are able to slide past each other. Hence, they have medium kinetic energy and some vacant space between each molecule.

In gases, the molecules are held by weak Vander waal forces. Hence, they have high kinetic energy due to which they move rapidly from one place to another leading to more number of collisions and wide spaces between each molecule.

Thus, we can conclude that when the students modeling as atoms stand or move in the taped-off section then they should all squeeze close together so that there is no vacant space.

it is to be noted that an alpha particle is an helium nucleus. so it contains 2 protons 2 neutrons and has a mass number of 4. when alpha decay particles are ejected from the nucleus it gets transformed into an atom which has atomic number less than 2 and a mass number less than 4.

an equation that could represent alpha decay is radium 226 decay of alpha particle forms radon 222.

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conduction is the transfer of thermal energy (heat in transfer) due to collisions between the molecules in the object. collisions between adjacent atoms and molecules transfer kinetic energy from the warmer to the cooler object. the objects must be in physical contact.