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Chapter 2

Chemisty

QuestionAnswer
Anything that has mass and takes up space matter
Matter is made up of these tiny particles. atoms
Substance that are made of only one type of atom and cannot be broken down into simpler substances by normal physical and chemical means elements
Particles in an atom that have a positive charge protons
particles in an atom that have no charge neutrons
The number on the periodic table that gives the number of protons of an atom for an element atomic number
These are atoms from the same element, but with different amounts of neurons isotope
The center of an atom nucleus
Outside the center of the atom electron cloud
Elements that have some properties of both metals and non-metals metalloids
The weighted average of the isotopes of an element Atomic mass
This is a row of elements on the periodic table where the properties gradually change period
Most of these elements are found as gases and the solid ones are brittle non-metals
Most of these elements are solid, shiny, malleable, ductile, and are excellent conductors of electricity. metals
This is usually a column of elements on the periodic table that share similar properties family
This represents an element's amount of protons atomic number
The most reactive group on the periodic table alkali metals
Substance found on Earth in all three phases or states water
Most stable group on the periodic table because its outer shells contain 8 electrons Noble gases
A solid changes directly into a gas sublimination
A substance made of more than one element bonded together compound
Theory that states that "the mass of the reactants will equal the mass of the products." Law of Conservation of Mass
A change in which a substance changes into a new substance and can be indicated by color change, heat or light produced. chemical change
The number of electrons that an atom needs in order to be stable eight
Type of bonding that occurs because of the attraction of oppositely charged atoms ionic bonding
Type of change in which the substance retains its properties and can be indicated by phase change, cutting, tearing, dissolving, absorption. physical change
Most stable family on the periodic table Noble gases
Most reactive family on the periodic table Alkali metals
Created by: cmorrow1
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