An elements shows the number of protons in its nucleus

The surface tension of which of the following liquid is maximum? a) H20 b) C6H6 c) CH3OH d) C2H5OH ... ?

Which of the following is the correct definition of mechanical energy? A. energy stored in chemical bonds of molecules B. energy resulting from the flow of charged particles, such as electrons or ions C.

Balance the following redox reaction if it occurs in acidic solution. What are the coefficients in front of H + and Fe3 + in the balanced reaction?

If you begin with 72 grams of Nickel, how many moles of Ni would you have?

Ionization energy is the minimum energy required to remove an electron from an atom in its ground state. It depends on the position of the elements in periodic table. Which of these elements has highest ionization energy? A) B B) C C) F D) Ne

Which statement is true for the given reaction? Zn + PbSO4

A student states the following: "Since acetone (nail polish remover) evaporate more readily than water, one would assume that acetone has weaker intermolecular forces than water." Evaluate their claim. (2 sentences)

A catalyst can only be used once. True False

On what basis do we distinguish between substances and separate them from one another?

What is the net ionic equation for the following reaction? H2CrO4 + Ba (OH) 2