SOAL ULANGAN UMUM SEMESTER GANJIL

Petunjuk I: Untuk setiap soal nomor 1 - 25, pilihlah satu jawaban yang benar di antara pilihan a, b, c, d, atau e.
1. Neutrons are particles found in all types of atoms. The inventor is ….
a. JJ Thomson
b. E Goldstein
c. Ernest Rutherford
d. Niels Bohr
e. James Chadwick

2. In the nucleus found the following data, except ….
a. Has positive charge
b. Has more neutrons than protons
c. Contains negative charge
d. Contains protons and neutrons
e. Contains neutral particle

3. True statements about Bohr's atomic theory are ….
a. Bohr accepted that the electron will lose energy in the path
b. Bohr states that the electron moves in circular path
c. Bohr argues that the electrons in the path has a certain energy and keep during the trajectory
d. Bohr rejected the notion that electrons can move from the energy trajectory higher to lower energy path or vice versa
e. Bohr states that electrons can move from a higher energy trajectory to the track whose energy is lower by absorbing energy

4. Zinc has 2 types of isotopes, which are Zn-65 (60%) and Zn-66 (40%). Ar of zinc is ….
a. 65,4
b. 65,0
c. 63,5
d. 63,0
e. 60,5

5. Chemical properties of element, which has atomic number 3, will be similar with elements which atomic number are ….
a. 7 and 17
b. 10 and 19
c. 10 and 20
d. 11 and 19
e. 11 and 20

6. The number of valence electrons with atomic number 20 is …
a. 1
b. 2
c. 3
d. 4
e. 5

7. The mass number of an element is 31 and its atomic number is 15. The number of proton, neutron, and electron of the element are ….
a. 16 protons, 15 neutrons, and 15 electrons
b. 15 protons, 16 neutrons, and 16 electrons
c. 15 protons, 15 neutrons, and 15 electrons
d. 16 protons, 15 neutrons, and 16 electrons
e. 15 protons, 16 neutrons, and 15 electrons




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8. An atom has 10 electrons, 10 neutrons, and 9 protons. The mass number, the atomic number, and the charge of the atom are ….
a. 20, 10, 1
b. 20, 9, 2
c. 19, 9, 1
d. 19, 8, 2
e. 19, 8, 1

9. X element has mass number of 24 and 12 neutrons. X element is on group and period ….
a. IA, 1
b. IIA, 2
c. IIIA, 3
d. IVA, 4
e. VA, 5

10.The atomic number of aluminium is 13. The electron configuration of Al3+ is ….
a. K = 2, L = 8, M = 0
b. K = 2, L = 8, M = 3
c. K = 2, L = 8, M = 6
d. K = 2, L = 9, M = 3
e. K = 2, L = 9, M = 6

11. Among the following elements, the element which with the largest valence electron is ….
a. 4Be
b. 7Cl
c. 9F
d. 10Ne
e. 19K

12. The element which can release electron very easily is ….
a. Na
b. K
c. Rb
d. Cs
e. Li

13. Element that has the largest electron affinity is an element with atomic number of ….
a. 2
b. 10
c. 13
d. 17
e. 18

14. In periodic system, an element with electron configuration of K = 2; L = 8; M = 5 is a member of ….
a. period 5, group VA
b. period 3, group IIIA
c. period 3, group IIA
d. period 5, group IIIA
e. period 3, group VA

15. Element X has 17 protons, 18 neutrons, 17 electrons. It is identified as member of ….
a. group VIIIA, period 3
b. group VIIA, period 3
c. group VIA, period 3
d. group VA, period 3
e. group IVA, period 3


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16. Among these compounds series, which have covalent bonds are ….
a. H2O, H2S, CCl4, CH4
b. KCl, NaCl, MgCl2, BaCl2
c. H2O, NaCl, CCl4, BaCl2
d. KCl, H2S, MgCl2, CH4
e. H2O, H2S, KCl, NaCl

17. The atomic number of an element is 9. The element achieve its stability with ….
a. gain 1 electron
b. gain 2 electrons
c. gain 3 electrons
d. donates 3 electrons
e. donates 2 electrons

18. A compound has chemical name calcium nitrate. The chemical formula that compound is ….
a. CaNO3
b. Ca(NO2)3
c. Ca(NO3)2
d. KNO3
e. KNO2

19. A chemical name of P4S10 is ….
a. tetrapotassium decasulphide
b. tetrapotassium decasulphuride
c. fourphosphorus tensulphide
d. tetraphosphorus decasulphuride
e. tetraphosphorus decasulphide

20. Use data in the table below.

Atom X Y Z W
Proton number 18 17 11 10
Neutron number 18 18 12 10
Electron number 18 17 11 10

Pair of atom that will form an ionic compound are ….
a. W and Z
b. Z and Y
c. Z and X
d. W and X
e. X and Y

21. Reaction between copper metal and oxygen gas can be written as …
a. 2 Co(s) + O2(g)  2 CoO(s)
b. 2 Co(s) + O2(g)  2 CoO(s)
c. Cu(s) + O2(g)  2 CuO(s)
d. 2 Cu(s) + O(g)  Cu2O(s)
e. 2 Cu(s) + O2(g)  2 CuO(s)

22. C3H8(g) + Xo2  Yco2 + Zh2O
The coefficient of x, y, z, to make this equation reaction balance are …
a. 4; 3; 5
b. 3; 4; 5
c. 4; 5; 3
d. 5; 3; 4
e. 3; 4; 5




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23. 16 g of sulfur dioxide (Mr = 64 g/mole) has similar total number of molecules with ...
a. 20 g SO3 (Mr = 80 g/mole)
b. 7,5 g NO (Mr = 30 g/mole)
c. 5,25 g NO2 (Mr = 46 g/mole)
d. 20 g Fe2O3 (Mr = 160 g/mole)
e. 8 g CO2 (Mr = 44 g/mole)

24. Among 1 g of these gases at STP, which has the biggest volume is ...
(Ar N = 14; C = 12; O = 16; S = 64; H = 1)
a. NO
b. CH4
c. SO2
d. CO2
e. NH3

25. The compound with molecular formula is ....
a. HSO
b. CHO
c. H2O
d. CH2
e. CH

Petunjuk II: Untuk setiap soal dari nomor 26 sampai dengan nomor 30, kerjakan dengan jawaban yang jelas dan benar di tempat yang tersedia.
26. A carbon compound contains 75% C (Ar = 12) and the rest is H.
Determine its empirical formula !

27. Write this reactions into equal equation!
Sodium carbonate reacts with chloride acid, and generates sodium chloride salt, water, and carbon dioxide.
28. Mention the basic chemical’s laws!
29. What is the meaning of covalent bond?
30. Write down the elements symbol with atomic number of all elements in period 4 !











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