Why is reactivity not a physical property

Design an experiment using a radioactive tracer to evaluate the amount of wear on steel auto engine cylinders using different types of lubricating oils. How should I do this? Any Ideas?

The electrons in the valence shell of many atoms do not leave the atom because the protons in the nucleus attract the electrons. However, in metals, electrons can flow from one atom to another. protons can flow from one atom to another.

An atom has a charge of - 3 in its orbitals. Which statement must be true in order for this atom to have no net charge? There are three positively charged protons outside the nucleus. There are three neutral neutrons in the nucleus.

What is the percent by mass (%m/m) concentration of ammonium hydroxide (nh4oh) in a solution prepared by dissolving 8.40 g nh4oh in 94.60 g of h2o?

How many milliliters of 0.258M NaOH are required to completely neutralize 2.00 g of acetic acid HC2H3O2?

What is a neutral atoms oxidation number

Suppose 30 grams of NaCl are placed in 900 mL of water. What is the molarity of this solution?

After a particularly cold day outside you go home to make some tea. you heat the water in the mug so that botch are about 75 degrees celcious. the tea bag is only 30 degrees celcious and the room is around 26 degrees celcious.

For main-group elements using the older numbering system the group number on the periodic table corresponds to which characteristic of the elements of that group

In the vertical columns of the periodic table, as the atomic numbers increase: a. the number of electron shells increases. b. the ionization energies increase. c. the number of electrons in the valence shell increases. d.