4. Fill in the gaps of the following table. Symbol 3+ 59 CO³+ Protons Neutrons Electrons Net charge 34 46 36 76 116 2+ 80 120 78

why is this the correct answer when potassium has 15 protons not 19?

Beryllium has an atomic number of 4. Which of the following statements is true of a neutral Beryllium atom? 1. It has 4 protons, 4 electrons, and 4 neutrons. O 2. It has 4 protons, 4 electrons, and 2 neutrons. O 3. It has 2 protons, 2 electrons, and 0 neutrons. 4. It has 2 protons, 2 electrons, and 2 neutrons.

For the following isotope, determine the number of protons (P), neutrons (N) and electrons (e-).X     P = 27    N = 33    e- = 27     P = 33    N = 27    e- = 33     P = 27    N = 27    e- = 33     P = 27    N = 33    e- = 60

Complete the following table by filling in the missing information in each blank. Please only type in numbers Element Symbol Protons Neutrons Electrons Mass Number Mg 12 25 Xe 78 Fe3+ 30 BiS+ 83 209 68 68 167 (type in correct symbol for this one) Tch 米 f8 f12 10 fg 144 fo

3 Complete the following table for the elements that are listed. If you have a full display of elements, check to see if your predictions are correct. Element Metal/Metalloid/ Prediction: Shiny/Dull Correct? Yes/No Nonmetal Chromium Shiny Yes Gold M Shiny Yes Lead M Shiny Yes Cadmium M Shiny Yes Silicon ML Shiny Yes C. The Atom Symbol of Element Name of Atomic Mass Protons Neutrons Electrons Element Number Number Iron 30 Aluminum 14 Potassium 20 Bromine 45 Gold 118

Not sure if I’m doing this right. Can you please explain how to find each column?

Diane, Timothy and Ira were having a discussion about isotopes and the tendency to react. Which do you suggest offers the best explanation? Diane felt that isotopes would react the same as the atoms of the same element since they had the same number of valence electrons. Timothy suggested that they would react the same since the isotope and the atom of the same element would have the same number of total electrons. Ira said that the isotopes would react different since the number of neutrons would vary and therefore the atomic mass of the isotopes versus the atom of the same element would be different.

Fill in the gaps in the following table, assuming each columnrepresents a neutral atom.

Analyze the symbols that we present: identify: a) Isotope Pairs b) atoms that have the same number of neutrons c) Different atoms of the same mass number d) Determine in each case the number of electrons