Why graphite can rub off the pencil onto the paper

covalent molecular solids (like sugar) and covalent network solids (like diamond) have similar bonds and bond strengths. However, molecular solids are brittle and network solids are very strong and durable. Explain the difference.

How did Thomson discover the electron?

Will sodium lose 6 electrons or gain 2?

The highest sustained pressure achieved in the laboratory is 1.5 * 107 kilopascals, kpa. what is this pressure in atm, mmhg, and torr?

What is more dangerous, current or voltage? Why?

What aspect of Bohr's original model of election stucture is no longer considered valid in the currently accepted theory of electron structure

Which topic is commonly used to explain activation energy and how chemical reactions happen A. reaction rate B. Collision theory C. Velocity distribution D. Spontaneous reaction

Calculate the density of a rectangular solid that has a mass of 25.71 g, and its dimensions are 2.3 x 4.01 x 1.82 cm.

When the metal sample reacts with acid, the gas evolved will be collected over water; the gas is said to be "wet".

Solid iron (II) sulfide reacts with aqueous hydrochloric acid HCl to produce hydrogen sulfide gas H2S and aqueous iron (II) chloride.