Mendeleev arranged the elements by what physical property?

yes you are doing it right great gob

explanation:

weathering - colorado river carves land in arizona to form the grand canyon. cracks form in a sandstone wall surrounding a house. a marble statue near the science museum is changing color due to rainfall

erosion - after a rainstorm, soil and rock piees litter the roadways. the sand dunes in the sahara desert are changing shape.

here's your answer.

if you add everything up correctly you should get 69 i got this because 50 plus 19 is it