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intro to chemestry

the definition of matter anything with mass and takes up space
The two major categories of matter Mixtures and substances
the difference between homogeneous and heterogeneous mixtures homo- Mixture is the same throughout hetero- different proportions
the difference between mixtures and substances substances can't be separated and mixtures can
what we call the smallest possible particle of a compound molecule
what we call the smallest possible particle of an element atom
what solids do/do not retain retain shape and size
how molecules move in a solid vibrate in place
what liquids do/do not retain size but not shape
how molecules move in a liquid fast and slip out of position
what gases do/do not retain neither size or shape
most common state of matter in the universe? plasma
definition of melting point solid to liquid
definition of boiling point liquid to gas
definition of freezing point liquid to solid
evaporation liquid to gas
condensation gas to liquid
sublimation solid to gas
density (solid) relationship between 2 measurements mass/volume
hardness (solid) measure of a solid's resistance to scratching
elasticity (solid) measure of a solid's ability to be stretched then return to it's size
brittleness (solid) the ability to shatter upon impact
ductility (solid) the ability of a material to be rolled into wires
tensile strength (solid) how much pulling or tension a material can withstand before breaking
density (liquid) relationship between mass and volume of an object
buoyancy (liquid) upward pressure on an object
viscosity (liquid) resistance to flow
particles "less than an object" subatomic
charge and mass of a proton posotive 1 amu
charge and mass of an electron negative 1/1836 amu
charge and mass of a neutron zero charge 1 amu
what is the core of an atom that has almost all of the atom's mass? neucleus
which subatomic particles are found in the neucleus? protons neutrons
what is the empty space outside the neucleus where the electrons are found? electronic cloud
What happens to the energy of electrons the farther away they are from the neucleus? It will increase
What number do we use to distinguish atoms? Atomic number
What force makes the neucleus want to split apart because the posotive protons want to repel? electromagnetic force
What holds the neucleus together Strong nuclear force.
what does periodic mean? repeating according to the same pattern
who developed the first periodic table? Bimitri Mendeleev
how did bimitri mendeleev organive the first table? Increasing atomic mass
Who fixed the periodic table? Henery Mosely
How did henery mosely organize the table? Atomic number
What are the two names of the 18 vertical columns on the periodic table? Group,family
How elements in the same family compare to each other similar
how does the size of an atom change as you move down a column? increases
How does the reactivity change as you move down a column? increases
What are the 7 horizantal rows? periods
how elements in the same row compare to each other completley different
how the size of an atom changes as you move across a row? decreases
what 2 subatomic particles always increase by 1 as you move across a row? protons and electrons
what are the 2 rows that are below the periodic table? the rare earth metals
what elements have luster? metals
which elements are dull? nonmetals
which elements can be shiney or dull metalloids
Which types of elements are ductile and malleable? metals and metalloids
which elements are good conductors? metals
what type of elements have the highest densities? metals
how many valence electrons do metals have? 1,2,3,4
wheather metals tend to gain or lose electrons when bonding? lose
what does corrosion mean? rust
how many valance electrons do nonmetals have 5,6,7,8
wheather nonmetals tend to gain or lose electrons when bonding? gain
family 1 name? alkali
family 2? alkali earth
family 3-12 transition
family 18? noble gases
Created by: tap517654