Why did mendeleev not order the periodic table by equal rows and columns

What is the meaning of the following metric prefixes kilo, deco, centi, milli, micro and nono

Which of the following would increase the volume of a gas? a: decreasing the pressure applied to the gas b: decreasing the temperature of the gas? c: decreasing the number of gas molecules d: decreasing the size of the gas molecules

If the absorbance of the 10μM solution is 0.24, what should be the absorbance of the 50μM? Write answer to two decimal places.

What is the reason for all these geological changes with the earth?

Asteroids ate rocky objects that revolve around the earth is it true?

Disintegration is the word geologists use for A. when a rock becomes moist. B. when rock is physically broken into smaller pieces. C. when rock is chemically broken into smaller pieces. D. when rock undergoes a rather large chemical change.

There us no sound in the vacuum of space Why? Answer all that are correct A) sound must travel through something that vibrates B) there is no energy in space C) there is no air to vibrate in the human eardrum

List the six steps of one full cycle of the scientific method post-lab

What is classified as a pure substance

How can a scientist make sure that the results are not a mistake in an experiment?