For each atom in the table below, write down the subshell from which an electron would have to be removed to make a +1 cation, and the subshell to which an electron would have to be added to make a -1 anion. The first row has been completed for you.

Fill in the table below by providing how many protons, and how many electrons in each atom/ion below.   # of protons # of electrons # of neutrons in the most common isotope (just FYI) H     0 H+     0 C     6 C+     6 C-     6 O     8 O+     8 O-     8 N     7 N+     7 N-     7 S+     16 P-     16 Cl     18 Br‑     45

Kead each description in the first column of the table below. If any chemical element with atomic number of 92 or less matches the description, check Yes and enter the chemical symbol of an element that matches. Otherwise check No in the second column. description Does any element with Z ≤ 92 match the description? If you checked yes, give the symbol of an element with Z ≤ 92 that matches. An element in Period 3 and Group 5A. Yes No A nonmetal in Group 6A. Yes No An alkaline earth metal with a higher atomic number than silicon. O Yes O No A main-group element in Period 4. O Yes No O ☐

How much energy is required to completely separate an electron from a proton that is 210.0 pm away? Express the energy in joules to four significant figures. 15. ΑΣΦ E = ? J

How many valence electrons are in element number 11 on the periodic table? (Remember element 11 means the element with 11 protons!)

Read each description in the first column of the table below. If any chemical element with atomic number of 92 or less matches the description, check Yes and enter the chemical symbol of an element that matches. Otherwise check No in the second column. description Does any element with Z ≤ 92 match the description? If you checked yes, give the symbol of an element with Z ≤ 92 that matches. An element in Period 4 and Group 1A. Yes No A semimetal in Group 8A. Yes No ☐ An element in the nitrogen family with a higher atomic number than boron. Yes No ☐ A main-group element in Period 4. Yes No ☐ ☑

What would happen if a proton were to be removed from a 26Mg atom? A positively charged ion of magnesium will be formed. O The identity of the atom will be changed altogether, in this case to sodium (Na). A different isotope of magnesium will be formed (25Mg). A negatively charged ion of magnesium will be formed.