People good at chemistry(answer these please)?????

Question

Give the number of protons and neutrons for each. Write the nuclear symbol for the atoms with; of the following;

1. 27

13 Al

2. 200

79 Au

3. 200

80 Hg

4. 205

81 Pm

5. 50

23 V

6. 99

43 Tc

7. 198

78 Pt

8. 108

47 Ag

9. 208

83 Bi

10. 168

67 Ho

11. 10 protons & 10 neutrons

12. 10 protons & 12 neutrons

13. 68 protons & 100 neutrons

14. 74 protons & 112 neutrons

15. A fluorine atom with 10 neutrons

16. A fluorine atom with 11 neutrons

17. An osmium atom with 115 neutrons

18. An atom of antimony with 74 neutrons

19. An atom of gallium with 36 neutrons

20. A xenon atom with 82 neutrons

* instant 10 points to the first to answer all of them ( A little explanation on how you work these monstrosities would be appreciated.)

Answer 1

For 1-10 you have the average mass number upper left corner = number protons + neutrons, followed by the atomic number lower left corner = # protons, then the atomic symbol. You can deduce the number of neutrons by subtracting the atomic number from the mass number. Radioactive elements have varying number of neutrons, notice:

1. 27-13 = 14 neutrons + 13 protons

2. 200-79 = 121 neutrons + 79 protons

3. 200-80 = 120 neutrons + 80 protons

4. 205-81 = 124 neutrons + 81 protons

5. 50-23 = 27 neutrons + 23 protons

6. 99-43 = 56 neutrons + 43 protons

7. 198-78 = 120 neutrons + 78 protons

8. 108-47 = 61 neutrons + 47 protons

9. 208-83 = 125 neutrons + 83 protons

10. 168-67 = 101 neutrons + 67 protons

Note: parenthesis for problem # (not part of nuclear symbol)

(11) 20

10 Ne

(12) 22

10 Ne

(13) 68

168 Er

(14) 74

186 W

(15) 9

19 F

(16) 9

20 F

(17) 76

191 Os

(18) 51

125 Sb

(19) 31

67 Ga

(20) 54

136 Xe

For 11-14, add the neutrons and protons to get mass number for the ? element. The element identity is given by the atomic number (# protons). For 15-20, add the number of protons in the most abundant isotope of each element (seen in periodic table) to the # neutrons you have. This gives the unknown mass number. Problem # 10 is not radioactive though.