Question

13 to 15 thank you

QUESTION 13 Which two elements have the same ground-state electron configuration? O Cu and Ag O Pd and Pt O Cl and Ar O Fe and Cu No two elements have the same ground-state electron configuration. QUESTION 14 How many moles of CaCl2 are formed in the neutralization of 138 mL of 0.352 M Ca(OH)2 with aqueous HCI? (sig. figs. matter for this one) QUESTION 15 How many kJ of heat are released when 15.75 g of Ba(s) reacts completely with oxygen gas to form Bao(s)? AH = -1107 kJ. O 70.3 kJ 114 kJ O 20.8 kJ O 63.5 kJ O 35.1 kJ Click Save and Submit to save and submit. Click Save All Answers to save all answers.

Answer 1

Ans 13. No two elements have the same ground electronic configuration.

Every element has a different atomic number and therefore a different number of electrons is present in its unionized elemental form. So, the same electron configuration with different numbers of electrons is not possible.