Ives – Chemistry – 5th Grade

the smallest particle (piece) of an element that still has all the properties of the element.  It is composed of protons, neutrons, and electrons
Change of state (or phase change)
 the changing of matter from a solid to a liquid, from a liquid to a gas, a gas back to a liquid, or a liquid back to a solid.
Chemical change
the changing of matter into a different kind of matter with different properties.  The actual molecules change and a new substance is formed
 a combination of two or more elements held together by chemical bonds that can not be seperated by physical means; the joining of two or more kinds of atoms into a molecule by a chemical reaction  
a negatively charged particle moving around the nucleus of an atom
the basic building blocks of matter;  a substance that cannot be broken down into a simpler substance; each one is made up of the same kind of atoms 
Ductile (Ductility)
Able to be stretched thin into a wire;  (the property of metal that allows it to be stretched into a wire)  
the amount of matter in an object
anything that has mass and occupies space
two or more substances that are mixed together but CAN be separated out because they are not chemically combined
 the smallest particle of a substance that that retains the chemical and physical properties of the substance and is made from two or more atoms 
a particle with no electrical charge in the nucleus (center) of an atom
the center of an atom where the proton and neutrons are contained tightly packed together
Physical change
a change in the properties of matter without forming a different kind of matter;  the look of the matter might change, but it still the same matter
a positively charged particle in the nucleus of an atom; The number of these in an atom gives an atom its atomic number
a mixture in which a substance breaks up into its most basic particles and spreads evenly through another substance
the force that holds atoms together to form a molecule
 a combination of symbols of elements that represent a compound;  for example NaCl is Sodium Chloride or salt
capable of being shaped by beating with a hammer or pressing; one of the properties of metals 
able to transmit heat or electricity easily; one of the properties of metal
one of the group of elements on the Periodic Table; these are malleable, ductile, and conductive.  (They can be shaped, stretched, and they conduct heat and electricity)
The elements on the Periodic Table that are brittle (not malleable or ductile), usually dull, and  NOT good conductors 
The small number next to the symbol for an element that shows the nmber of atoms of that element is in a formula.  The 2 in H2O.
Shells ( or energy levels)
the electron paths in an atom

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