Chemistry Problems Senior 2 : Atom, molecule, atom relative mass, relative molecular mass, empirical and molecular formula, atom model

DAILY TEST   CHEMISTRY

CLASS  XI

Fill  in the blank

1. Atom is…
2.  Molecules…..
3.  Compound is…………
4. Chemistry is………..
5. Electron discovered by……….
6.  Proton discovered by…………
7.  Neutron discover by………….
8.    ………………………….. argued that atom was ball-shaped with positive charge, and its negative charged electron were spread inside the ball.
9. The ionic equation for MgCl₂, MgO, LiCl
10. The ionic equation for MgSO₄, HNO₃, AgNO₃
11. What is the relative molecular mass of H₂ ( Ar H= 1)
12. What is the relative molecular  mass of H₂SO₄ ( Ar H=1, S=32, O=16)
13. What is the relative molecular mass  of Fe₂(SO₄)₃  (Ar Fe =    , S=32, o=16)
14. What are the number of proton, neutron , electron of
15. What are the  number of proton, electron ,and neutron of  of
16. Write down the electron configuration of ₂₉Cu
17. Write down the electron configuration of ₈₃Bi
18. Write down the electron configuration of ₃₄Se^2-
19. .   …………………………..  argued that atom is built from positively charged  nucleus and negatively charged electron  around the atom’s nucleus.
20. What is the moles of  32 gram of S ( Ar = 32)
21.  What is the moles of  22 gram of CO₂ ( Mr = 44)
22. The number of Avogadro constant is…….
23. Determine  quantum number of the last  electron of ₂₀Ca
24. Determine quantum number of the last electron of ₂₁Sc
25. An atom has four quamtum number, n n =3 , l=1, m = -1, s = -½, determine  group and period of this atom.
26. Calculate the number atoms of 32 gram S ( Ar S= 32) if Avogadro constant = 6.02 x 10²³
27. Calculate the number molecules of 22 gram CO₂ ( Mr = 44) ) if Avogadro constant = 6.02 x 10²³
28. Empirical formula is………..
29. Molecular formula is………
30. 0.35 mole  of H₂ SO₄, determine its mass….. ( Mr H₂SO₄)

Essay

1. Explain and draw about atom model of John Dalton
2. Explain and draw about atom model of J.J. Thomson
3.  Explain and draw about atom model of Rhuterford
4. Explain and draw about atom model of Bohr
5. Write down the electron configuration and determine group and periode of ₈₈Ra
6. Write down the electron configuration and determine group and periode of ₅₆Ba
7. Determine the four quantum number of the last electron ₇₈Pt
8.  Nitrogen oxide 36,37% of oxygen weight ( Ar = N = 14, O = 16)
9. An analysis on ionic compound shows that the compound contains 2.82 gram of sodium, 4.35 gram of chlorine and 7.83 of oxygen . define the empirical formula of the compound.
10. A compound contains 2.4% of hydrogen, 39% of sulfur and 58% of oxygen. (Ar  S = 32, H = 1, O = 16). Define the chemical formula of the compound.