Question

1. Describe the importance of chemical elements to living organisms.
2. Explain the formation of compounds.
3. Describe the structure of an atom (subatomic particles, nucleus, electron cloud).
4. What is the difference between an element and its isotope?
5. Distinguish between ionic, hydrogen, and covalent bonds.
6. What effect does CO₂ have on the ocean? Explain the implications.

Just trying to get a better understanding on the following before my exam. Any help would be wonderful. Thank you

1. what is is the difference between an element and its isotopse?

2. Explain thr formation of compounds?

3. Describe the structure of an atom, subatomic particles, nucleus and electron cloud?

Answer 1

Importannce of chemical elements to living organisms ;

1. Whole human body is made up bones and the main constituent of bones is Calcium (Ca) , the haemoglobin and myoglobin are Iron (Fe) compound which carry oxygenated and deoxygenated blood in the body , human needs oxygen to survive .

2. In plants , chlorophyll , the green pigmet which causes photosynthesis (the main process of life ) , is made of Magnesium (Mg) .

3. Human and plants needs essential elements for survival like Na , K etc .

Compound formation - when elements combine in a particular ratio by undergoing a chemical reaction to form a chemically new species , that species is called compound .

E.g. H2(g) + O2(g) >>>>> H2O(l)

Water (H2) is a compound made by reaction of hydrogen and oxygen .