17. From CO₂, H₂O, BeCl2, and N₂O which have the same molecular geometry?
A. CO2, H₂O, and N₂O B. CO₂ and BeCl2 only C. H₂O and N₂O only D. CO2, BeCl2, and N₂O
18. of the three types of radioactivity characterized by Rutherford, which of the following are particles?
A. gamma rays B. beta rays C. Alpha and beta rays D. alpha, beta and gamma rays
19. Which one of the following represents an acceptable possible set of quantum numbers (in order n, 1, m₁, m.) for an electron in an atom?
A. 2, 1, 0, 0 B. 2, 0, 2, ¹/2 C. 2,1,-1, D. 2,0,1,-1/2 20. The type of compound that is most likely to contain a covalent bond is one that is
A. a solid metal B. composed of only nonmetals C. composed of a metal from left and a non-metal from far right of the periodic table D. held together by the electrostatic forces between oppositely charged ions.
21. According to the valence bond theory, which orbitals on bromine atoms overlap in the formation of the bond in Br₂? A.3s B. 3p C. 4s D.4p
22. how many orbitals are there in an atom with n=4 ? A. 2 B. 8 C. 16 D. 25​