BIOA02H3 Lecture : lecture 3

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plumcod332

28 Apr 2011

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Life like all other matter is identified similar to all other elements on the periodic table. 6 highlighted elements represent 98% of what life is made off. Minerals are required to function along with vitamins. Radioisotopes are result of an incline or decline in neutrons. Exciting electrons causes the use of energy, atom holds it, otherwise would be lost, but in this case the energy falls back into a stable orbit. A molecule is a substance consisting of 2 or more atoms bonding together through ha chemical reaction, or it can also be oxygen, o+o=molecule. Sodium and chloride alone are known to be toxic, but together produce sodium chloride which is non-toxic. Covalent bonds are the strongest seen within biology. Larger the element, towards the bottom of the periodsic table you get a lower electronegativity, as well as leftright. Most important electronegative element on the periodic table is oxygen.

Related Questions

Water molecules have one oxygen atom that is moreelectronegative than the two hydrogen atoms bound to it. As aresult, which type of bonding holds the atoms within one watermolecule together?

A. non-polar covalent bonding

B. polar covalent bonding

C. Ionic bonding

D. hydrogen bonds

pinkmacaw695

1- How is microbiology defined? What types of organisms are considered microorganisms? What terms do we use to describe people who study the different types of microorganisms?

2- What are some positive interactions as well as negative interactions we have with microorganisms? Remember, we have ca. 10X more microbial cells on or in our bodies than we do cells of our bodies.

3- How is matter defined? What are the 3 states of matter?

4- What is an atom? What particles make up on atom? Where are these particles found within the atom?

5- What elements are most abundant in living cells (human cells)?

6- What are isotopes? How are radioactive isotopes used in research applications?

7- Remember that molecules (combinations of 2 or more atoms) are held together with chemical bonds.

8- How does a covalent bond differ from an ionic bond? What distinguishes a polar molecule from a non-polar molecule?

9- The pH scale ranges from 0 (most acidic) to 14 (most basic); 7 is neutral.

10 How does an organic chemical differ from an inorganic chemical.

I'm not getting those questions

sangriaoyster318

Why is carbon such a versatile and abundant atom in living systems? Select all correct answers (more than one may apply)

A. There is a lot of carbon available in the earth's crust

B.Carbon has a full valence electron shell and hence is chemically stable

C. Carbon can form up to four covalent bonds with other atoms

D. Carbon can make many kinds of molecules - it can form long chains with other carbon atoms as well as atoms of other elements

E. Carbon can form quadruple covalent bonds with itself

BIOA02H3 Lecture : lecture 3

BIOA02H3 Full Course Notes

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