umberofthe ici y total electrons and valence electrons are found in an atom of c

Question

umberofthe ici y total electrons and valence electrons are found in an atom of cach of the folowving elements? Watis the Elements Total # of Electrons Valence Electrons Ga Principal Energy level Sn Bi 13. Determine the number of protons and electroas in each of the following sons. 10 pts a. Ch- b. Mg- c P. d. Mn- e. Kr 14. Which of the following pairs of atoms and/or ions are isoelectronic with one another? 3 pts a. Se, Kr b. Bi, Rn c. Ca2, Ar 1S. Arrange each of the following lists of elements in order of increasing atomic size: 2 pts a. Bi, Sb, Na b. Pb, Rb, Ca 16. Arrange each of the following lists of elements in order of increasing Electron Affinity: 3 pts a B, St, Na b. Pb, Rb, Ca c. Ni, P, O 17, What is the number 3,000 written in scientific notation using the proper number of significant figures? 5 pts A, 0.003 × 10-, B. 0.3x104 8. Which physical property of an astronaut will change depending on whether he or she is on Earth or in orbit? 5 pts C. 3 x 10 D.3x 10 E. 3.000 x 10 B. weight C. volume D all would change E. none would change mass 19. A chemical reaction releases 44.3 kJ of heat. What is the equivalent amount of heat expressed in calories? [I cal 4.18 J] 5 pts D. 10,600 cal E. 18,500 cal C. 185 cal 20. Air has an average density of 0.001226 g'ml. What volume of air would have a mass of L.O Ib? (454 g- 1 C. 557 mL A. 10.6 cal B. 106 cal 5 pts A. 37 mL D. 2.7 x 10 mL E 3.7x 10L B. 370 mL

Explanation / Answer

Element          Total of Elements       Valence Electrons          Principal Energy level
Na                11                           1                       3
Ca                20                           2                   4
Ga                31                           3                       4
Sn                 50                           4                     5
Bi                                  83                           5                     6

13.
a.Cl^- = 17 protons = 18 electrons
b.Mg^2+ = 12 protons =10 electrons
c. P    = 15 protons = 15 electrons
d. Mn   = 25 protons = 25 electrons
e. Kr   = 36 protons = 36 electrons
14.
a.c.Ca^2+ ,Ar
15.
a. Bi,Sb,Na
16.
c.Ni,P,O
17.
C.3*10^3
18.
A.mass
19.
44.3KJ = 44300J = 44300*0.239Cal = 10600cal
D.10,600cal
20.
1lb = 454g
mass = 454g
density = 0.001226g/ml
volume = mass/density
        = 454/0.001226   = 3.7*10^5ml = 3.7*10^2 L
E.3.7*10^2 L

Related Questions

Navigate

• Browse (All)
• Browse U
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.