The particle with the greatest mass is the: (d) electron (e) photon 34. alpha pa

Question

The particle with the greatest mass is the: (d) electron (e) photon 34. alpha particle (b) proton (c) neutron 35. The nucleus of an atom of 2U contains: 92 electrons and 92 protons 146 neutrons and 92 protons 238 protons 92 neutrons and 238 protons 146 protons and 92 neutrons (b) (a) (c) (e) ( (d) A titanium atom in its ground state has one or more electrons in how many electronic orbitals? (a) 4 36. (d) 12 (e) 22 (b) 7 (e) 11 37. The electronic configuration of P atom is: (b) 1s, 2,2ps, 38.3p If a phosphorus atom were to gain three additional electrons, the resulting species would be: (a) (b) (c) (d) (e) 38. negatively charged and isoelectronic with argon negatively charged and isoelectronic with neon positively charged and isoelectronic with argon positively charged and isoelectronic with Mg smaller than a neutral phosphorus atom 39. The orbital diagram that best describes a carbon atom in its ground state is: ls 2s 2p 6 11 itI Which of the following subshells has room for 10 electrons? (a) 5s 40. (b) 4p (e) 2p (d) 3d(e) 3p Naturally occurring rubidium consists of just two isotopes. One of the isotopes consists of atoms having a mass of 84.912 amu; the other of 86.901 amu. Wha the heavier isotope? (AW of Rb 85.4678) (a) 15% (b) 28% (c) t is the percent natural abundance of 37% (d) 72% (e) 85%

Explanation / Answer

34.

(a) Alpha particle has more mass

35.

(c) 146 neutrons and 92 protons

36.

Ti (Z = 22) E.C is 1s2 2s2 2p6 3s2 3p6 4s2 3d2

(b) 7

37.

(b) P (Z=15) E.C is 1s2 2s2 2p6 3s2 3p3

38.

(a) Negatively charged and isoelectronic with argon

39.

(a)

40.

(d) 3d because d - subshell has 5 orbitals and each orbitals can accommodate 2 electrons and hence d-subshell can accommodate 10 electrons

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