bio2ch2 - Chapter 2 Life and Chemistry: Small Molecules 1)...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Chapter 2 Life and Chemistry: Small Molecules 1) Atoms a) Nucleus i) Protons (1) Positive charge (2) Mass of 1 ii) Neutrons (1) No charge (2) Mass of 1 b) Electrons i) Negative charge ii) Negligible mass iii) Found in orbit around nucleus 2) Elements a) Six elements are required for the existence of life i) Hydrogen ii) Carbon iii) Nitrogen iv) Oxygen v) Phosphorous vi) Sulfur 3) The periodic table a) Atomic number i) Number of protons b) Atomic mass i) Number of protons + number of neutrons 4) Isotopes a) Different forms of the same element i) Same number of protons ii) Different number of neutrons b) Radioisotopes i) Unstable ii) Give of energy as alpha or beta radiation 5) Electrons a) Negative charge b) Involved in chemical reactions c) Found in orbitals i) Region of space where an electron is found 90% of the time ii) An orbital can contain 2 electrons maximum 6) Chemical Bonds a) Forming molecules b) An attractive force that links atoms together c) Compound – a molecule made up of more than one type of atom i) CO2, H2O, C12H22O11
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 04/07/2008 for the course BIOL 2180 taught by Professor Harmich during the Spring '08 term at Toledo.

Page1 / 3

bio2ch2 - Chapter 2 Life and Chemistry: Small Molecules 1)...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online