Chapter 2.1 And 2.2 Vocab Flashcards
Atom
Is the smallest unit of matter
Nucleus
Is the center of an atom made of protons and neutrons
Electron
Negatively charged particle that is always in motion
Isotope
Atoms of the same element that are different in the number of neutrons
Compound
Is a substance formed by a chemical combination of two or more elements
Element
Is a pure substance made of the same type of atom
Ionic bond
Is formed when one or more electrons are transferred from one atom to another
Ions
A neutral atom that gain negative charge
Covalent bond
When atoms share electrons
Molecule
when atoms are joined by a covalent bond and make a structure
Vander Waals forces
The underside of a geckos foot has millions of hairs that make it stick to things
Hydrogen bond
The attraction between a hydrogen atom with a partial positive charge
Cohesion
The attraction between molecules of the same substance
Adhesion
The attraction between molecules of different substances
Mixture
A marterial composed of two or more elements
Solution
liquid mixture in which the minor component
Solute
the minor component in a solution, dissolved in the solvent.
Solvent
able to dissolve other substances
Suspension
a heterogeneous mixture of a liquid and solid particles that do not dissolve in the liquid
PH scale
To indicate the concentration of H+ ions in a solution
Acid
Any compound that releases H+ ions in a solution
Base
Is a compound that makes OH- ions in to a solution
Baffer
Are weak acid and bases that can react with strong acids and bases to make sudden changes in PH
