Practice... Of Chemical Reaction 🎷 1

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Practice and discipline/ keep patience are very essential for understanding or learning chemical reactions.

In daily life, many natural and man-made chemical reactions occur, but we might not be aware of how to write that chemical reactions.

To write a chemical reaction, basic preparation is necessary. First, it's necessary to remember a minimum of one to twenty basic elements. Additionally, knowledge of the symbols for these elements is necessary.

1. Hydrogen (H), 

2. Helium (He)

3. Lithium (Li), 

4. Beryllium (Be)

5. Boron (B), 

6. Carbon (C)

7. Nitrogen (N), 

8. Oxygen (O)

9. Fluorine (F), 

10. Neon (Ne)

11. Sodium (Na), 

12. Magnesium (Mg)

13. Aluminum (Al),

14. Silicon (Si)

15. Phosphorus (P),

 16. Sulfur (S)

17. Chlorine (Cl), 

18. Argon (Ar)

19. Potassium (K), 

20. Calcium (Ca)

21: Scandium (Sc)

22: Titanium (Ti)

23: Vanadium (V)

24: Chromium (Cr)

25: Manganese (Mn)

26: Iron (Fe)

27: Cobalt (Co)

28: Nickel (Ni)

29: Copper (Cu)

30: Zinc (Zn)

If we know the proper definitions of some terms then it's easy to understand this topic.

1. Atomic number: The number of protons (p) or electrons(e) present in an atom is called its atomic number (Z)

2. Valency:  The capacity of an element to combine with other elements is called its valency.

Or

For completion of duplate or octate how much electrons given or accepted by an element is called its valency

3. Electronic configuration: The distribution of electrons in the shell / orbit is called electronic configuration.

 n represents the shell number.

shell/ | formula 

Orbit |   ---------

        |  2n^2

------------------------

1      |   2

2.          |   8

3      |  18

4      |   32

5      |   50

6      |    72

 The valence shell shows the capacity of an element to combine with other elements.

If we know the valency of an element then it is easy to understand radical.

There are some rules for writing about chemical reactions.

1. If there are two or more reactants, put a plus + sign between them.

2. If there are two or more products, put a plus + sign between them.

3. Always write the reactants on the left side and the products on the rightside.Show the arrow pointing from the reactants to the products.

4. If a precipitate is formed, indicate it with a downward arrow.

5. If a gas is formed, indicate it with an upward arrow.

6.Show the physical state of the reactants and products in chemical reactions (Solid (s), Liquid (l), Gas (g).

🎷 Always represent Balanced chemical reactions  .So always keep the right whole number of reactant elements and products elements.

❤️ In nature some elements don't  present alone they are in duplet form; for example, hydrogen (H2), chlorine (Cl2), nitrogen (N2), oxygen (O2), fluorine (F2), bromine (Br2) are diatomic molecules.

Na + Cl → NaCl

But chlorine gas exists as diatomic, the reaction becomes

Na + Cl2 → NaCl

In the above example, the physical state  is not shown.

Na(s) + Cl2(g) → NaCl(s)

Now balance the equation 

2Na + Cl2 → 2NaCl

Balancing  an equation is an art. 

In chemical reactions, check which elements the least number of atoms first.  At the time of balancing chemical reaction makes sure that the number of reactants and products are the same.

  While balancing, aim for equal numbers on both sides of the equation.

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