Which subatomic particle has the smallest mass? a neutron a proton an electron an alpha particle don't use Ai for answering this

Using the information given in the following table, indicate whether each of the following pairs of atoms are isotopes. a. Atom A and atom B b. Atom A and atom C c. Atom A and atom D

Which particles in an atom are most responsible for the chemical properties of the atom? Where are these particles located in the atom?

What is the charge of the nucleus of element 89?

Naturally occurring sodium has a single isotope. Determine the following for the naturally occurring atoms of sodium: a. The number of neutrons in the nucleus. b. The mass in u of the nucleus to three significant figures.

What is the number of each type of subatomic particle in a potassium-41 atom? Write its nuclear symbol in both commonly used forms. State the mass number and atomic number of the isotope.

Read the Chemistry in Focus” segment “Whair”Do You Live? How can isotopes he used to identify the general region of a person’s place of residence?

Though the common isotope of aluminum has a mass number of 27, isotopes of aluminum have been isolated (or prepared in nuclear reactors) with mass numbers of 24, 25, 26, 28, 29, and 30. How many neutrons are present in each of these isotopes? Why are they all considered aluminum atoms, even though they differ greatly in mass? Write the atomic symbol for each isotope.

Naturally occurring aluminum has a single isotope. Determine the following for the naturally occurring atoms of aluminum: a. The number of neutrons in the nucleus. b. The mass in u of the nucleus to three significant figures.

The last “missing” element from the first six periods was promethium, which was finally discovered in 1947 among the fission products of uranium. Determine (a) the ratio of the number of neutrons in a 145Pm nucleus to the number of protons, and (b) the number of electrons in a single promethium atom.