Answer Happy

Communication: 8 marks True/False Indicate whether the statement is true or false. 1. The quantum mechanical model of the atom is capable of determining the exact location of an electron in an atom. A. True B. False 2. All alkali earth metals have valence electrons in s orbitals when they are in their ground state. A. True B. False 3. Quantum mechanics involves using probabilities to determine the shape of an atom. A. True B. False 4. The valence p orbitals in phosphorus, P, are half-filled. A. True B. False

19. Which atoms/ions could have the valence electron configuration shown below? it it id it S р S A. N B. 02 D, CI - E. all of the above C. Ar 20. Which of the atoms could have the following valence electron configuration? ît 1 it р A. carbon D. sulfur B. nitrogen E. none of the above C. boron 21. Which of the following is the electron configuration for a halogen? A. 1s 2s 2p D. 1s 2s B. 1s 2s 2p 3s E. 15-2s2p C. 1s 2s 2p 22. What are the four quantum numbers for the valence electron of francium (Fr)? A. 1,0,0, D. 73.0.5 B. E. none of the above 70,00 / c. 12 23. Which of the following element has the condensed electron configuration as [Kr] 58'. 400, A. copper D. gold B. nickel E. none of the above C. chromium 24. Which element has the ground state electron configuration (Ne) 35°3p, 3p,' for its valence electrons? A. Mg B. C. Si D. P E. S