What does it all mean? Why did Mendeleev classify elements? How do the groups demonstrate patterns in the Periodic Table? Write your thoughts here. Do not post any links or your comment will get deleted.
I will give brainliest to the person who can answer this in perfect detail.

Why does karst topography exist in some geographic location? a. few climates have enough oxygen b. most regions have rock layers other than limestone c. in most regions, the soil is too thin d. the water is too acidic enough in most places

Why does a collision with an airbag cause less damage than a collision with a steering wheel

During the apollo moon missions, astronauts were concerned about the effects of newton's third law of motion when: o a. they ejected waste water, because they were concerned that it would push them off course. o b. they reentered earth's atmosphere, because they were carrying heavy moon rocks. o c. they took off from earth, because a large force was required to generate large acceleration. o d. they detected incoming space debris, because the inertia of the debris could damage their ship.