Chemistry flashcards, diagrams and study guides
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arrow drawn to show the uneven distribution of electrons in a bond or molecule, a molecule that has a center of positive charge and a center of negative charge.
wavelength of an object is inversely proportional to its mass, or in other words, equation used to determine mass or wavelength when either of those and speed is given
Anything that has mass and takes up space
Smallest particle of an element. Composed/made of protons, neutrons, and electrons.
A subatomic particle that has a positive charge and that is found in the nucleus of an atom
organizes elements by their properties
repeating chemical and physical properties change in a repeating pattern with the elements' atomic numbers
vertical column on the Periodic Table of Elements; members share chemical and physical properties; share the number of valence electrons
A tool used to organize the elements by atomic number.
The amount of protons in the nucleus of an atom.
An average sum of the number of the protons and the number of neutrons in the nucleus of the atom.
The horizontal rows on the periodic table. Elements in the same row have the same number of electron shells/energy levels.
The vertical columns on the periodic table. Elements in the same group/family have the same number of valence electrons. (Except Helium which is in Group 8, but only has 2 valence e-)
Are good conductors of electric current and heat. -Malleable -Ductile -Metallic luster -Solid at room temperature
anything that has mass and volume
the measure of the amount of space that an object takes up
the measure of the amount of matter in an object
the basic particle from which all elements are made
A substance that cannot be broken down into simpler substances
this is a force of attraction between 2 atoms
A water molecule consists of one oxygen atom and two hydrogen atoms. Oxygen atoms are negative (-); Hydrogen atoms are "Happy" or Positive (+). H2O is a polar molecule because Oxygen and Hydrogen are oppositely charged.
The sticking together of particles of the same substance. (Water likes its own COmpany)
The sticking together of particles of different substances (Water ADds itself to others)