Yolo Chpts 1 & 2 Test No Idea What To Study Flashcards
Water is electrically neutral
8 protons, 8 electrons
The attraction between a hydrogen atom with a partial positive charge and another atom with a partial negative charge is known as
Hydrogen bond
Cohesion
Spiders, water beads
Attraction to molecules of the SAME Substance
Adhesion
Water attached to cup
Attraction between molecules of DIFFERENT Substances
Radioactive isotope -
Isotope has unstable nuclei
- keemo, dating, keep up with organisms
Ionic bond
Formed when one or more electron is TRANSFERRED from one atom to another
Covalent bonds
When electrons are SHARED by atoms instead of being transferred
An atom that looses an electron becomes
Positive, and vise versa
Positively and negatively charged atoms are known as ions
When atoms share 2 electrons, the bond is called a single covalent bond. Share 4, double
The molecule
The structure that results when atoms join
Solution - all of the components of the mixture are evenly distributed
Solute - the dissolved substance
Solvent - the substance to which the solute dissolves
Water = greatest solvent
A pH scale
Indicates the concentration of H+ atoms in a solution.
Ranges from 0-14
The lower the pH, the greater the acidity!
Solutions with a pH of above 7 are called basic because they have more OH- ions then H+
Polymerization
Monomers coming together
4 groups of macromolecules in loving things (+ elements)
- Carbohydrates C, H, O
- Lipid. C, H
- Nucleic acids. C, H, O, N, P
- Protein. C, H, O, N
