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Questions and Answers
What are the four major elements found in living organisms?
What are the four major elements found in living organisms?
- Carbon (C) (correct)
- Nitrogen (N) (correct)
- Oxygen (O) (correct)
- Hydrogen (H) (correct)
Define trace elements.
Define trace elements.
Trace elements are required in only very small amounts, but you cannot live without them.
What are the basic structures of atoms and their subatomic particles?
What are the basic structures of atoms and their subatomic particles?
Atoms are the smallest unit of matter that retains properties of an element. They consist of protons (+), neutrons (no charge), and electrons (-).
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Study Notes
Major Elements in Living Organisms
- Four major elements: Oxygen (O), Carbon (C), Hydrogen (H), Nitrogen (N).
- These elements are essential for building biological molecules like proteins, nucleic acids, carbohydrates, and lipids.
Trace Elements
- Trace elements are essential nutrients needed in very small quantities.
- They play a crucial role in various biological processes.
- Deficiencies can lead to health issues, such as Goiter from iodine deficiency and anemia due to insufficient iron.
Structure of Atoms and Subatomic Particles
- Atoms are the fundamental units of matter, maintaining the properties of their respective elements.
- Subatomic particles include:
- Protons: positively charged particles located in the nucleus.
- Neutrons: neutral particles also found in the nucleus.
- Electrons: negatively charged particles that orbit around the nucleus.
- The balance of protons and electrons determines the overall charge of an atom.
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