What basic properties of Mendeleev's periodic table are similar to the current one?

In Mendeleev's periodic table there were gaps for undiscovered elements. Modern periodic table maintains uniformity. In Mendeleev's periodic table noble gases were not placed (as they are not discovered at that time). In Modern periodic table noble gases in a seperate group named as group-18.

Explanation:

fire could start, buildings collapsing, and ash falling from the sky.

explanation:

this is because the buildings or plants could catch on fire and the buildings would most likely collapse. lastly ash would fall because all the burning would cause ash to fall from the sky.

hope this .