Advertisements
Advertisements
Question
Give three reasons why – carbon dioxide is considered a compound, while carbon – an element.
Advertisements
Solution
Carbon dioxide (C02) has a formula and properties of C02 to extinguish fire etc. are quite different from the properties it constituents carbon and oxygen. Oxygen (O) and carbon (C) are elements as these are made up of one kind of atoms. Also, carbon is combustible and oxygen is a supporter of combustion
APPEARS IN
RELATED QUESTIONS
Give two examples of the following :
Solid + Solid mixture
The atoms of which of the following pair of elements are most likely to exist in free state ?
How are the elements with variable valency named? Explain with an example.
Match the non-metallic elements – with their correct symbols. Non-metallic elements are:
| Non-Metallic elements | Symbol |
| (a) Carbon | (1) O |
| (b) Chlorine | (2) I |
| (c) Oxygen | (3) Si |
| (d) Phosphorus | (4) C |
| (e) Hydrogen | (5) Cl |
| (f) Nitrogen | (6) P |
| (g) Iodine | (7) F |
| (h) Bromine | (8) H |
| (i) Fluorine | (9) S |
| (j) Silicon | (10) Br |
| (k) Sulphur | (11) N |
Write the formula of the compound formed – given symbols and combining power or capacity (valency) of the following element in the compound.
Na1+ Cl1-
Give the symbol of the following element:
Neon
State the type of element for the following:
Carbon
State the type of element for the following:
Phosphorus
Give the qualitative and quantitative meaning of the term ‘symbol’.
What is the significance of the symbol of an element?
