Calculate and round to the correct number of significant digits . 3.57 x 104
4.0 x 102
9.0 x 10-7
8.925 X 107
8.9 x 107
8.93 x 10-2

Which of the following isotopes has the same number of neutrons as phosphorus-31?

Where are electrons with the lowest energy found? in the nucleus farthest from the nucleus outside the atom closest to the nucleus

Use the periodic table and your knowledge of isotopes to complete these statements. when polonium-210 emits an alpha particle, the child isotope has an atomic mass of 1-131 undergoes beta-minus decay. the chemical symbol for the new element is fluorine-18 undergoes beta-plus decay. the child isotope has an atomic mass of done intro donne