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Science Vocabulary

reactive group of elements with 2 valence electrons (group 2 of PT) alkaline earth metals
law stating that an atom cannot be created or destroyed law of conservation of matter
small numbers on chemical formula indicating the number of atoms in an element/compound subscript
substances that are created as the result of a chemical reaction products
change in substances creating a new compound chemical change
positively charged particle found in the nucleus of an atom proton
atomic model representing all electrons and energy levels bohr model
smallest particle of matter atom
forms the same element with different numbers of neutrons isotope
electrons on the outer shell of an atom that participates in bonding valence electron
a way of representing atoms/molecules by showing valence electrons as dots lewis dot structure
chemical bonds created when electrons are shared (nonmetal + nonmetal) covalent bond
atom or molecule with a net charge due to loss or gain of electron ion
neutrally charged particle found inside the nucleus of an atom neutron
big numbers in front of a compound indicating the number of molecules coefficient
chemical bonds created when electrons are transferred (metal + nonmetal) ionic bond
negatively charged particle found around the nucleus of an atom electron
substances that take part in a change during a chemical reaction reactant
change that does not involve a change in substances' chemical composition physical change
drawing a conclusion based on data and observation inference
the base unit of measurement for length in the metric system meter
variables that are kept the same (controlled variables) constant variables
describing something based upon your five senses observation
universal method of measurement metric system
the base unit of measurement for mass in the metric system gram
variables that are intentionally changed to see the effect independent variable
variable being measured dependent variable
observable data that is not measured qualitative data
data which can be measured quantitative data
the base unit of measurement for volume in the metric system liter
possible explanation or answer to a question; "educated guess" hypothesis
horizontal rows in the periodic table where elements in each row have the same number of atomic orbitals period
very reactive group of elements with 7 valence electrons halogen
shiny, dense, ductile elements found on the left side of the PT metals
substance made of one type of atom; this is the basic substance that cannot be broken into simpler substances element
elements that are dull, non-conductors of electricity or heat; found on the right side of the PT non-metals
vertical columns in the periodic table where elements in each column have the same number of valence electrons group/family
two or more atoms/molecules physically together, not bonded mixture
two or more atoms chemically bonded compound
unreactive group of elements with a full set of valence electons (group 18 of PT) noble gases
Russian chemist who formulated the periodic table based on the periodic law Dmitri Mendeleev
anything that has mass and volume matter
elements that have properties of both metals and non-metals metalloids
very reactive group of elements with 1 valence electron (group 1 on PT) alkali metals
reactive group of elements with 2 valence electrons (group 2 of PT) alkaline earth metals
length and direction of a straight line between starting and ending points (vector) displacement
how fast an object travels (distance/time) speed
quantity represented by magnitude alone scalar quantity
a change in position relative to a reference point motion
speed and direction of an object in motion velocity
a stationaty point or something to describe position or motion refernce point
rate of change in velocity acceleration
quantity represented with an arrow with both direction and magnitude vector quantity
total path between two points (scalar) measured in meters (vector) distance
an objects distance in a certain direction from a reference point position
Created by: lily yoss