An isotope of manganese has 25 protons and 30 neutrons. What is the mass number of this isotope?

Chemical equations need to be balanced in order to satisfy the law of

The granular fertilizer 11 -11 -11 is composed of 11 % nitrogen, 11 % phosphate, and 11 % potassium. similarly, the fertilizer 19 -17 -0 is composed of 19 % nitrogen, 17 % phosphate, and 0 % potassium.

If the role of neutrons in an atom is to maintain stability, how is a hydrogen atom stable in nature? (hydrogen atom is the only atom with no neutrons.)

In calculating the concentration of [Cu (NH3) 4]2 + from [Cu (H2O) 4]2+, the stepwise formation constants are as follows: K1=1.90*104 K2=3.90*103 K3=1.00*103 K4=1.

What are particles of carbon otherwise known as, and what kind of pollution do they cause?

Andre is predicting the products of chemical reactions. In one reaction, a hydrocarbon is the only reactant. What is the best prediction and explanation of this reaction? Two new compounds form as the hydrocarbon undergoes a synthesis reaction.

What evidence is there that electrons move around in definite pathways around the nucleus? What evidence is there that electrons m

Are greenhouse gases good for us?

How to convert metric units?

Without calculation what is the approximate atomic mass of neon