Which subatomic particle determines the identity of an atom

Two different ionic compounds each contain only copper and chlorine. Both compounds are powders, one white and one brown. An elemental analysis is performed on each powder.

Which chemical symbols will complete the equation for this decomposition reaction

What is the pH of a 5.41g of HNO3 in 7L of solution? (mass of HNO3=63.02g)

Xian drew a diagram to compare deletion mutations and substitution mutations. Which label belongs in the area marked "X"?

a sample of gas has a volume of 12.0 L and a pressure o 1.00 atm. If the pressure of gas is increased to 2.00 atm, what is the new volume of gas if the temperature. stays constant?

Student follow up The ionic equation for the reaction between zinc and sulfuric acid is. Zn (s) + 2H (aq) - - Zn" (aq) + H2 (g) a State what has been oxidised in this reaction. Explain your answer in terms of electrons.

What kind of group 1 atoms are the most reactive? a. Small atoms c. Atoms with the most electrons in the valence level b. Large atoms d. Atoms at the top of the periodic table

What does it mean when there are 2.3 x 10-4 moles?

Electric force is an A. attraction and repulsion between protons and electrons . B. attraction and repulsion between protons and neutrons. C. attraction and repulsion between neutrons and electrons.

A salt crystal has a mass of 0.18 mg. how many nacl formula units does it contain?