Question

euron in the bacte 12. The sumber of proton ironi) wateNO) rous trichloride PC tantum number (1) 09 13. In which of the following pairs the name and bene a: Sodium nitrate NaNO, b. sulfur trioxide SO, sentation in space of an atomie 14. Which quantum number of the following deseribes the orbital? a. The magnetic quantum number (ml) b. The azimuthal (angular momentum quantum um c. The spin quantum number (ms) d. The principal quantum number (m) 50 ml of 0.355 M solution of Naz How many grams of Na2SO4 are required to prepare 25 a. 12.6 g 6. 6.38 Which is the best definition of electro negativity? a. Electronegativity is the energy required for a gaseous an seous atom to gain an electron. b. Electronegativity is the attraction between the nucleus and cleus and the valence electron. c. Electronegativity is the attraction of an atom for a bonding pair a bonding pair of electrons. d. Nothing of all un element with the general electronic configuration Ar| 3d'" 4s? 4p"? A. VIIA b. IIIA C.IVA c. 188 d. VIA the correct formula for magnesium nitride is? (a) MgNO3. (c) Mg(NO3)2 (b) Mg3N2 (d) Mg2N3 Na lamp emits yellow light with a wavelength of 589 nm. What is the energ of a single photon in this light? a. 3.38 x 10-19 6.1.12 x 10-25 c. 1.17 x 10-33 d. 5.09 x 1015

Answer 1

12. Blurred image

13. C.   

IRON (III) Sulphate : Fe2 (SO4) 3

14. A.

Magnetic quantum number describes the orientation of the electron

Principal Quantum Number describes the shell in which the electron recides. azimuthal quantum number describes the subshell, while spin quantum number describes the spin of the electron.

15.
15) m=? Motor 142 glmal V = 250mL M = 0.355M molarity = mass molar mass X Volume mass = 0.355mor X142g x250xlo3 L U molt = 112. Gog] Av 17) [4x7 3 do 43² 464 I & II A group. [dv (18) Man Mg ₂ N2 Bv (19) 7=589 nm = 589x109 m E-hc = 6.626x153x3 x10$ TM + + -589x16 an. JUUNDUS

LE=3.38x1679 J As

16. C

Electronegativity is defined as a tendency of an atom to attract shared electron pair involved in the covalent bond.