Lecture 2

Lecture 2 - Lecture 2 Electrons Carry a negative charge...

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

View Full Document Right Arrow Icon
Lecture 2 Electrons Carry a negative charge Repel one another Are attracted to protons in the nucleus Move in orbitals (levels) – volumes of space that surround the nucleus Electron vacancies Unfilled shells make atoms likely to react H, C, O, and N all have vacancies in their outer shells Chemical bookkeeping Use symbols for elements when writing formulas Formula for glucose is C6H12O6 o 6 carbons o 12 hydrogen o 6 oxygen Chemical equation shows reaction o Reactants -> products We take in food molecules to use for energy (immediate or stored) or for building blocks Major organics molecules Carbohydrates o Common energy source o Molecules: sugars (quick immediate energy) and starches (long lasting) o Monomers: Glucose o Polymers: Glycogen (muscles), cellulose (plant cell walls), chitin Lipids o Hydrophobic o More energy per gram than carbohydrates o Fats and oils A, D, E, K are fat-soluable vitamins and cannot be obtain from fat
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.

Page1 / 3

Lecture 2 - Lecture 2 Electrons Carry a negative charge...

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