Qu 4. How many protons, neutrons, and electrons are present in an atom of gold, Au,
with a mass number of 197?
197 protons, 276 neutrons, 79 electrons
79 protons, 118 neutrons, 79 electrons
Du Do
79 protons, 197 neutrons, 118 electrons
&
118 protons, 72 neutrons, 118 electrons

The atomic radius of sodium is 186 pm and of chlorine is 100 pm. the ionic radius for na+ is 102 pm and for cl– is 181 pm. in going from na to cl in period 3, why does the atomic radius decrease while the ionic radius increases? a. the inner electrons in the sodium cation shield its valence electrons more effectively than the inner electrons in the chloride anion do. b. the inner electrons shield the valence electrons more effectively in the chlorine atom than in the chloride anion. c. the outermost electrons in chloride experience a smaller effective nuclear charge than those in the sodium cation do. d. the outermost electrons in chloride experience a larger effective nuclear charge than those in the sodium cation do. e. monatomic ions are bigger than the atoms from which they are formed.

Right anwser gets marked brainliest newton's discovery concerning how fast an object will change speed is the: 1st law 2nd law 3rd law universal gravitation

In which reaction is precipitation occurring?