BISHOP MOORE VIDYAPITH KAYAMKULAM
STD: IX
WORKSHEET 1
SUBJECT
:
Chemistry
Answer the following:
1. What are the properties of cathode rays.
2. State Dalton’s atomic theory.
3. Explain Rutherford’s scattering experiment.
4. What are the conclusions of Rutherford’s experiment.
5. What are the draw backs of Rutherford’s theory.
6. State postulates of Bohr’s atomic theory
7. Define a) atomic number b) mass number 3) Isotope
8. Draw the structure of the following
23
1) Na11
35
2) Cl17
9. Draw the electron dot diagram and atomic structure of Nacl and H 2O
10. Draw the isotopes of carbon.
11. Copy and complete the table
S. No
1
2
3
4
5
Element Z
A P e
n E.C
Na
23 11
Mg
12 12
B
5
6
E
19
9
Ca
40 20
12. State
I)
Dobereiner’s law of triads
II)
Newlands law of octaves
III)
Modern periodic law
IV)
Mendeleeff’s periodic law
13. What are the characteristics of Mendeleeff’s periodic table
14. What are the property trends of a group and a period.
15. How many periods and groups are there in the long form of periodic table.
16. What is meant by periodicity of properties, periodic properties, Normal elements, Bridge
elements.
17. Compare the properties of alkali metals and halogens.
18. Define
i)
Ionisation potential
ii)
Electron affinity
iii)
Atomic radius
19. Write the formula of the following;
i)
Iron (III) Sulphate
ii)
Gold(II) Chloride
iii)
Sodium Zincate
iv)
Pottassium Permanganate
v)
Aluminium Phosphate
20. Balance the following equations:
i)
ii)
iii)
iv)
v)
Cu + HNO3
KMnO4
Al + NaOH + H2O
K + H 2O
Ag2O + H2O 2
Cu(NO3)2 + NO + H2O
K2MnO4 + MnO4 + O2
NaAlO2 + H2
KOH + H2
Ag +H2O+ O2