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Chemistry DUT 1

Chemistry Test 1

Matter is composed of extremely small particles, too small to be seen with a classroom microscope, called ____ atoms
Atoms the smallest part of an element that has the chemical properties of the element.
Matter anything that has mass and takes up space.
Matter can be classified on the basis of its ___ composition
Elements pure substances that cannot be changed into simpler substances
Elements are composed of ___ kind of atom one
Compounds pure substances that are composed of two or more types of elements that are chemically combined.
Compounds can only be changed into simpler substances called elements by ___ changes chemical
Molecule formed by combining two or more atoms
Mixture composed of two or more different substances that retain their own individual properties and are mixed together.
Mixtures can be separated by ___ means physical
Types of physical separation filtration, sifting, or evaporation
___ can be heterogenous or homogenous Mixtures
Heterogenous Mixture a mixture that is not uniform throughout, the component substances can be visibly distinguished.
Homogenous Mixture a mixture that is uniform throughout, the substances are evenly mixed and cannot be visibly distinguished.
Solution another name for a homogenous mixture
Luster, Conductors, Malleable, Ductile, High Density Physical properties of metals
Luster Having a shiny surface or reflecting light brightly
Conductors Heat and electricity move through them easily
Malleable Ability to be hammered into different shapes
Ductile Ability to be drawn into a wire
High Density Heavy for their size
Dull, Nonconductor, Brittle physical properties of nonmetals
Dull not shiny
Nonconductor Heat and electricity do not move through them easily
Brittle solids that break or shatter easily
Periodic Table used to identify the basic organization of elements.
Period a horizontal row on the periodic table
The elements on the periodic table are arranged numerically by ___ ___ atomic numbers
Family vertical columns of elements on the periodic table (also called groups)
Elements in the same ___ have similar properties family
Metals A major classification of elements generally located on the left side of the zigzag line on the periodic table.
Examples of metals Sodium, Calcium, Iron, and Aluminum.
Nonmetals A major classification of elements generally located on the right side of the zigzag line on the periodic table
Examples of nonmetals Chlorine, Oxygen, Sulfur, and Iodine
Chemical Symbol shows the atoms of the elements composing a substance.
___ are written with one, two, or three letters Symbols
Na Sodium
Cl Chlorine
H Hydrogen
O Oxygen
C Carbon
N Nitrogen
___ are made up of one kind of atom and the symbol for each element is unique elements
___ are composed of more than one element and their formulas have more than one type of symbol showing the different elements that compose the compound Compounds
Chemical Formula constructed from the symbols of the elements composing the substances
Subscript a number that shows how many of each kind of atom are in the compound
The subscript is written to the lower ___ of the element symbol right
NaCl table salt
H2O water
C6H12O6 glucose
O2 oxygen gas
CO2 carbon dioxide
N2 Nitrogen
Chemical reaction When a substance is broken apart or when substances are combined and at least one new substance is formed.
Chemical equation Used to represent a chemical reaction that has occurred; it contains the chemical names or the chemical formulas of the substances that are involved in the reaction.
In a chemical equation, the arrow can be translated as ______ or _______. yields or makes
Reactant Substances broken apart or combined in a chemical reaction and are located on the left side of the arrow.
Product New substances formed in a chemical reaction and are located on the right side of the arrow.
The law of conservation of matter states that matter can neither be created nor destroyed, but can be changed in form.
Balanced chemical equation has the same number of each kind of atom on the reactant side as on the product side.
Coefficient the number that comes before the chemical formula and indicates the number of molecules that participate in the reaction.
Created by: Ms. Phillips



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