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35 Cards in this Set

  • Front
  • Back

anything that has mass and takes up _______

matter. space

small particle that is a building block of matter

atom

center of an atom

nucleus

the nucleus is made up of __________ which have a __________ charge

proton. positive

the nucleus is all made up of ____________ which have __________ charge

neutron. neutral or no charge

not all atoms have the same numbers of protons, __________, and electron

neutrons

matter with a composition that is always the same

substance

one type of substance is an ____________, which contains only one type of atom

element

each type of atom contains a different number of ________ in its nucleus

protons

the number of protons in an atom is called the _______ of an atom

atomic number

most elements consist of __________ atoms, but the atoms of some elements exist in ___________

individual. groups

type of substance containing atoms of two or more different elements chemically bonded together

compound

a chemical ________ is the combination of symbols and ________ that represent a compound

formula. numbers

the symbols in a chemical formula show the different ________ in the compound

element

the number of each type of atom in a chemical formula is given by a __________

subscript

if no subscript is written, only _______ atom of the element is in the chemical formula

one

the properties of a _____________ are different from the properties of the elements it contains

compund

matter that can vary in composition

mixture

the components of a mixture are ______ blended together, so they can be separated by _______ means

physically. physical method

the amounts of different components of a mixture can ________ from one sample to another

vary

mixture, the individual substances are not evenly mixed

heterogeneneous

mixture, the individual substances are evenly mixed together

homogeneous

another name for a homogeneous mixture is a _______

solution

in a solution, one or more ________ are dissolved in the ___________ which is the substance that is present in the largest amount

pollutes. solvent

when something _________, it forms a solution by mixing evenly

dissolves

chemical formulas can be used to describe _________ but not ___________

compound. solution

the components of a compound are ________ combined, but the components of a solution are _______ combined

chemically. physically

the composition of a _________ can vary, but the composition of a _______ does not vary

solution. compound

what particles make up atoms

protons, neutrons, electrons

describe the electrical charges of the particles in an atom

protons-positive


neutron-neutral or no charge


electrons-negative

what are the two main classifications of matter

substances and mixtures

how do the two main classifications of matter differ

substances do not vary in compositions and mixtures can vary in compositions

how are elements related to compounds

each compound is made of atoms of two or more different elements chemically bonded together

what can you learn about a compound from its chemical formula

the different atoms that make it up

compare solvent and a solute

a solvent is the substance that is present in the largest amount of a substance and everything is a solute. solutes dissolve in the solvent