If an atom has an atomic mass of 19 and an atomic number of 9, how many protons, neutrons and electrons does it have?

protons = 9

neutrons = 10

electrons = 9 because it is neutral atom

Explanation:

atomic number= protons = 9

atomic mass= protons + neutrons

19= 9 + n

n= 10

geosphere and hydrosphere.

this is because the geosphere has to do with geological events, while the hydrosphere controls all water on earth.

the dissociation of nickel hydroxide is follows:

the concentration of hydroxide ion is

the equilibrium constant value of nickel hydroxide is = 6.1 * 10^-^1^6 and thus equilibrium equation can be written as:

thus, concentration of ni is 0.23 * 10^-^4 mol /l