Chapter 3-5 Student Chemistry Worksheet - Class X, Central Board Of Secondary Education Page 13
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30Formative Assessment Manual for Teachers
Carbon and its Compounds - Chapter 4
Suggested Remediation:
●
A few students may find it difficult to write the correct name or structure of the
simple hydrocarbons, they may be-encouraged to name the simple compounds first by
following the ruies.
●
Some students may and it difficult to differentiate between baldheads, ketenes and
alcohols .when written in condensed form, they may be helped by writing the open and
condensed structures of the same compound.
●
Some students may forget to count the carbon of carboxyl group in the base(root)
chain. Teacher may reiterate that all the carbons that are linked to each other in a chain
without any hetro atom (O, N etc.) in between are to be counted in the chain.
Carbon and its Compounds
Chapter 4
Assessment Technique: Diagram Based Worksheet
Objectives:
To enable the students to -
●
appreciate that some elements form compounds by sharing of electrons to form, covalent
bonds Understand that carbon with four valence electrons, forms only covalent bonds.
●
Correlate the bonds formed as single, double or triple to the number of pairs of
electrons shared between the atoms, learn writing electronic dot structure for formation
of covalent compounds calculate and identify the number and types of bonds in a
compound formed by sharing of electrons.
Task:
Individual Procedure
Teachers may give this worksheet to the students after teaching-learning experience of bonding in
carbon.
●
Carbon has 4 electrons in outermost shell so it can neither loose electrons nor accept
electrons to attain a noble gas configuration as both the processes involve high energy.
So it forms bond by sharing its valence electrons with atoms of other elements to gain
an orate of electrons. The shared electrons belong to the outermost shells of both the
atoms and lead to both atoms attaining the noble as configuration.
●
The bond formed by sharing electrons is called covalent bond, Not only carbon, but
many other elements form molecules by sharing electrons.
●
A single covalent bond represented by a line between the two atoms, is formed by
sharing one pair of electrons.
●
A double bond represented by two lines between the two atoms, is formed by sharing
two pair of electrons.
43
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