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Mixtures, Elements,

Study Tool For Mixtures, Elements, and Compounds

What is one way that scientists classify matter? Composition
What can all matter be classified as? Mixtures, elements, or compounds.
What are mixtures? Two or more substances that are not chemically combined with each other and can be separated by physical means.
What do substances in a mixture retain? Their individual properties.
What are solutions? A special kind of mixture where one substances dissolves in another.
What are the two types of solutions? Solutes and solvents.
What is the universal solvent? Water
What are elements? The simplest form of pure substances.
How can elements be broken or changed into something else? They cannot be broken into anything else by physical or chemical means.
What are compounds? Pure substances that are the unions of two or more elements
What and how can compounds be broken into? They can be broken into simpler substances by chemical means.
What is a compound if it is not uniform throughout? It is a heterogeneous mixture?
What is a heterogeneous mixture considered? It is considered the "least mixed".
What is special about a heterogeneous mixture? It is not the same throughout.
What is special about the particles in a heterogeneous mixture? The particals are large enough to be seen and to be separated from the mixture.
What are examples of heterogeneous mixtures? Sand, pebbles, oil, and water.
What is a mixture that is uniform throughout? A homogeneous mixture.
Is a homogeneous mixture, well mixed or less mixed? Well mixed.
What are the particals like in a homogeneous mixture? The particals are very small and not easily recognizable.
What is a solution? A homogeneous mixture formed when one substance dissolved in another.
What are elements? The simplest pure substance.
Can an element be changed into a simpler substance? An element can not be changed into a simpler substance by heating or any chemical process.
What is the smallest part of an element? An atom.
When elements combine, what do they create? A compound.
What are atoms of the same element? Alike.
What are atoms of a different element? Different.
When was it created and what is the periodic table? In 1813, a system of representing elements with symbols was introduced.
What does each symbol consist of? One or two letters.
When are two letters needed for an element? When the first letter of that element's name has already been used.
What is sodium's letters? Na
What is chlorine's letters? Cl
What is hydrogen's letter? H
What is oxygen's letter? O
What is carbon's letter? C
What is nitrogen's letter? N
What are compounds also? Pure substances.
Why is water a compound? Because it can be broken down into simpler substances- Oxygen and Hydrogen.
How are chemical formulas constructed? They are used by using the first letter of an element and it's subscript.
What do subscripts show/represent in a chemical formula? The number of atomic elements.
Where is a subscript for a certain element located? After the first element pertaining to the one before it.
What if there is no subscript…..what does that mean for the element? It means that it has only one of that element.
What is salt's chemical formula? NaCl
What is water's chemical formula? H2O
What is sugar's chemical formula? C6H12O6
What is oxygen gas's chemical formula? O2
What is carbon dioxide's chemical formula? CO2
What is nitrogen gas's chemical formula? N2
What is the periodic table used for? It is used to help people locate and understand the elements and what makes up things at the molecular level.
What are the horizontal rows on the periodic table called? Periods.
What about the vertical rows on the periodic table? Groups.
How many vertical rows are there on the periodic table? 18
Each vertical row has something in common; what does each vertical row share? The same number of electron shells.
How are the elements on the periodic table arranged? They are arranged in order of increasing atomic numbers.
What does the zigzag line on the periodic table mean? It separates metals and nonmetals.
What are metals according to the periodic table? They are a major classification on the periodic table.
Where are they located on the periodic table? They are located on the left side for the periodic table.
What are nonmetals according to the periodic table? A major classification of elements generally located on the right side of the zigzag line on the period.
Where are they located on the periodic table? Generally located on the left side of the zigzag line on the periodic table.
What are metal's specific properties? Luster, conductors, malleable, ductile, and high density.
What are nonmetal's specific properties? Brittle, nonconductors, and dull.
Created by: 10034158