egayoza
61. proton, neutron, dan elektron 2. neutron dan proton 3. orbit/kulit 4. konfigurasi elektron 5. inti atom, lintasan 6. elektron valensi 7. proton, elektron 8. neutron dan proton 9. 14 10. isotop. 12C6, 13C, 14C6 11 atom-atom yang memiliki jumlah neutron yang sama. 9Be4 dan 10B5 12. isobar. 40Ar18 dan 40Ca20 13. orbital 14. kelimpahan B-10 = x kelimpahan B-11 = 100 - x Ar = [(% × A1) + (% × A2)] ÷ 100 10,8 = [(x × 10) + ((100 - x) × 11)] ÷ 100 1080 = 10x + 1100 - 11x x = 20 kelimpahan B-10 = 20% kelimpahan B-11 = 100 - 20 = 80% 15. Mr H2O = massa 1 molekul H2O ÷ (1/12 × masa atom C-12) 18 = massa 1 molekul H2O ÷ (1/12 × 2 × 10^-23) massa 1 molekul H2O = 3 × 10^-23 massa 200 molekul air = 3 × 10^23 × 200 = 6 × 10^-21 16. Ar X = massa 1 atom X ÷ (1/12 × masa atom C-12) = a ÷ (1/12 × b) = 12a/b 17. Mr C3H6 = massa 1 molekul C3H6 ÷ (1/12 × masa atom C-12) 42 = massa 1 molekul C3H6 ÷ (1/12 × 2 × 10^-23) massa 1 molekul C3H6 = 7 × 10^-23 massa 100 molekul C3H6 = 100 × 7 × 10^-23 = 7 × 10^-21
2. neutron dan proton
3. orbit/kulit
4. konfigurasi elektron
5. inti atom, lintasan
6. elektron valensi
7. proton, elektron
8. neutron dan proton
9. 14
10. isotop. 12C6, 13C, 14C6
11 atom-atom yang memiliki jumlah neutron yang sama. 9Be4 dan 10B5
12. isobar. 40Ar18 dan 40Ca20
13. orbital
14. kelimpahan B-10 = x
kelimpahan B-11 = 100 - x
Ar = [(% × A1) + (% × A2)] ÷ 100
10,8 = [(x × 10) + ((100 - x) × 11)] ÷ 100
1080 = 10x + 1100 - 11x
x = 20
kelimpahan B-10 = 20%
kelimpahan B-11 = 100 - 20 = 80%
15. Mr H2O = massa 1 molekul H2O ÷ (1/12 × masa atom C-12)
18 = massa 1 molekul H2O ÷ (1/12 × 2 × 10^-23)
massa 1 molekul H2O = 3 × 10^-23
massa 200 molekul air = 3 × 10^23 × 200 = 6 × 10^-21
16. Ar X = massa 1 atom X ÷ (1/12 × masa atom C-12)
= a ÷ (1/12 × b) = 12a/b
17. Mr C3H6 = massa 1 molekul C3H6 ÷ (1/12 × masa atom C-12)
42 = massa 1 molekul C3H6 ÷ (1/12 × 2 × 10^-23)
massa 1 molekul C3H6 = 7 × 10^-23
massa 100 molekul C3H6 = 100 × 7 × 10^-23 = 7 × 10^-21