Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Bell Ringer • Explain at least 3 differences between Atoms & Cells. ATOM • Atoms are the smallest unit of matter. • Everything is made of atoms. • Example: Carbon Video 1: What Is an Atom? https://www.youtube.com/watch?v= o-3I1JGW-Ck Element • An element is made of only one type of atom. • It is a pure substance. • Atoms of the same element have the same properties. • Example: Carbon Video 2: How Small Is an Atom? https://www.youtube.com/watch?v= _lNF3_30lUE NOTE: Stop video @ 2:30 min Subatomic Particles • Protons – Positive (+) charge – Found in the nucleus – Does not change (always the same for the same element) – Accounts for part of the atom’s mass • Electrons – Negative (-) charge – Found outside the nucleus – Can be lost, gained, or shared to form chemical bonds between atoms – Valence electrons are the outermost electrons – An uncharged atom has the same number of electrons as protons • Neutrons – Neutral (0) charge – Found in the nucleus – Accounts for part of the atom’s mass – If lost or gained, the mass changes Video 3: How Can You See an Atom? https://www.youtube.com/watch?v= ipzFnGRfsfE Add the charges to your diagrams! Ions • Ion = Charged Atoms caused by a change in the number of ELECTRONS • The number of electrons is different from the number of protons • Lose electron = + charge; Gain electron = - charge Ions are used in many biological processes, including neuron communication. Video 4: What Are Ions? https://www.youtube.com/watch?v= ipzFnGRfsfE Isotopes • Isotope = Atom with a different Mass because there is a different number of NEUTRONs • Atomic Mass is an Average Mass of all Isotopes • Radioactive Isotopes are used to Tag and Trace specific molecules through biological processes Carbon Isotopes Video 5: What Are Isotopes? https://www.youtube.com/watch?v= xjY5p-1CDr8 Chemical Bonds • Ionic = transfer (give-take) of electrons – Weaker than covalent, stronger than hydrogen • Covalent = Share a pair of electrons – Single, double, or triple – Strongest type of bond • Hydrogen = weak attraction between Hydrogen and other atoms Video 6: Chemical Bonding https://www.youtube.com/watch?v= LK2fIn_U0MY STOP HERE Complete any diagrams, etc. that you did not finish. Carbon • Organic Compounds = Made of Carbon • All living things are made of Carbon Compounds • More versatile than any other element • Atomic # = 6 – Has 4 Valence Electrons • Always forms COVALENT bonds • Can form 4 bonds – Single, double, or triple – Ring shapes or chains Organic Compounds • Inorganic = does NOT contain Carbon • Organic = contains Carbon • 4 Types of Organic Macromolecules in Biology – Carbohydrates – Lipids – Proteins – Nucleic Acids Monomer vs. Polymer • Monomer = single subunit that can be combined to make a larger molecule (polymer) Example: Amino Acid • Polymer = Large molecule made of smaller subunits (monomers) Example: Protein