Who said that atoms could not be created?

Write a generic equation that can be used to convert the mass of a substance to volume using density.

Which statement describes surface waves? They arrive before S waves. O They travel faster than P waves. They are produced by P and S waves. O They travel deep below Earth's surface.

How are valence electrons different from other electrons in an atom?

A half-life is the time it takes an amount of substance to decay to one-half of its original amount. For example, the sample is one-half after the first half-life but one-quarter (i. e., one-half of one-half) after the second half-life.

Technician A says that water floats to the top of fuel in the tank. Technician B says that water is more likely to be drawn into the system when the fuel level is low. Which technician is correct?

A whale is 24 meters long. A rhinoceros is 400 cm long. Which is longer? By how much?

Which statement is true about trends in metallic character? a) Metallic character increases as you go to the right across a row in the periodic table and as you go down a column.

How much energy is consumed by thawing 4.3 g ice? O A. 4.3 g x 1 mol/18.02 g 6.03 kJ/mol B. 4.3 g x 1 mol/18.02 g x 4.186 kJ/mol C. 4.3 g x 1 mol/18.02g x 40.65 kJ/mol D. 4.3 g x 1 mol/18.02 g * (-285.83) kJ/mol

Identify the product of radioactive decay and classify the given nuclear reactions accordingly.

Alkanes, alkenes, and alkynes are examples of A. aliphatic compounds B. aromatic compounds C. carcinogens