A single atom of an element has 21 nutrons 20 electtons and 20 protons which element is it

The first two quantum numbers for the LAST "p" electron in the atom Br" are: 1) 4,3 2) 4,1 3) 3,1 4) 3,2 5) 4,2

Which of the following reacts differently when exposed to strong acids than when it is exposed to weak acids? A. Electrical current conduction B. pH paper test C. Reaction with magnesium D. All of these

The salt that is formed during the reaction between potassium hydroxide and hydrochloric acid is

An iron atom had an atomic number of 26 and an atomic mass 55.8 may. how many protons does an atom have

Dimensional analysis definition chemistry

What is litmus paper used for? To indicate if all the reactants have been used up to determine if a chemical reaction has occurred to determine pH to detect the presence of water

You open your lemonade stand with 100 lemons, 5 bags of sugar containing 6 cups each, and 10 gallons of water (16 cups per gallon). Which statement is NOT true about the production of lemonade in your stand?

For the complete combustion of 5.6dm3 of a gaseuos hydrocarbon CxHy. 28.0dm3 of oxygen gas were used, 16.8dm3 of CO2 gas and 18.0gof liquid water were produced all gases measurement were made at stp. Determine the chemical formula of the hydrocarbon

What kind or plate tectonic boundary is the san anfreas fault?

What is it called when the state of matter that keeps its shape and volume when it's placed in a different container