Matter of Nature & Properties of Water Flashcards
Types of Data
qualitative and quantitative
shared characteristics of life
made of cells
reproduce
genetic code/dna
grows/develops
respond to environment
homeostasis
uses material
energy
matter
anything that has mass and volume
atoms
basic unit of matter
elements
consist of one type of atom
structure of atom
-protons and neutrons in nucleus
-electrons on energy levels
Valence electrons
-electrons in outermost energy level
-involved in bonding
Bonding
-atoms bond with other atoms to
-become more stable
-ionic bonding
-covalent bonding
-when atoms bond molecules and compounds are formed
ionic bonding
-involves a transfer of electrons
-result in ions = atoms with an excess postitive or negative charge
covalent bonding
-involves sharing of electrons
-results in molecules with single, double, and triple covalent bonds
Bond symbols
Single bond: H-H
Double bond: O=O
Triple bond: N_=N
Molecular formula
letters and numbers
ex: H2O
structural formula
shows arrangement of atoms
ex: of water H-O-H
-if you see a point or structure without label assume carbon
Water
-molecule of water is neutral, but there is uneven sharing of electrons
-Oxygen=slightly negative
-Hydrogens=slightly positive
- this uneven distribute of charge= polar molecule
-can from hydrogen bonds
Hydrogen Bond
-attraction between an H atom of one molecule and a non-H atom of another molecule
-attractions between molecules not within them
-weaker than ionic bonds
-Cohesion
-Adhesion
