Is it true or false that landslides occur when earth materials that are no longer held by friction move down a slope with the of gravity?

What is the density of the black hole

The table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 10 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.

Match the mixture with the substance// i really need on this guys (it’s a pic btw)