5. On which property of the particles in a material does the speed of sound
depend? sc.7.P.10.3
A the dimensions of the particles
B the forces between the particles
C the shape of the particles
D the number of particles

B. the forces between the particles

Explanation:

The speed of sound is highly dependent on the "medium" that it is traveling through. The more rigid the medium is, the faster the sound travels. The density of a medium is dependent on the forces between the particles. When it comes to solids, their particles are tightly packed because they have a very strong intermolecular force. Their density is greater too, and due to lack of space, they are "not compressible." This allows the sound to travel faster as well.

assuming that your periodic table has eighteen columns, you should highlight   the four elements in the third column from the left of the table.

neutral atoms of elements after calcium contain d electrons. the energy of d orbitals of a particular main shell lies between the energy of the s and p orbitals of the next main shell. for example, electrons in the have energy higher than those in the orbital while lower than those of the orbital.

by the aufbau principle, electrons fill orbitals one at a time, starting from those of the lowest energy. the orbital is therefore filled right after orbitals and before orbitals.  

potassium has electron configuration and calcium . the s orbital of a main shell holds a maximum of two electrons. the next element would thus have the electron configuration and satisfy the requirements.

a neutral atom of the element contains three electrons on top of the most recent noble gas element. it should thus be placed in the third column of the periodic table. both scandium and yttrium would satisfy the conditions. an aufbau diagram indicates that the 4f orbital is filled before the 5d. however, it appears that exceptions exists for both lanthanum and actinium. neutral atoms of the two d-block elements also demonstrate the and should be highlighted as well.