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Questions and Answers
A chemical method of separation, such as ______, will require a chemical change where chemical bonds are broken and/or formed.
A chemical method of separation, such as ______, will require a chemical change where chemical bonds are broken and/or formed.
electrolysis
A ______ is a substance made up of only one type of atom.
A ______ is a substance made up of only one type of atom.
element
Rusting of iron is a ______ change because a new substance with different properties is formed.
Rusting of iron is a ______ change because a new substance with different properties is formed.
chemical
Unlike mixtures, ______ cannot be separated by physical means because the components are chemically bonded.
Unlike mixtures, ______ cannot be separated by physical means because the components are chemically bonded.
A homogeneous mixture, like a solution of sugar and water (______), exhibits uniform composition throughout.
A homogeneous mixture, like a solution of sugar and water (______), exhibits uniform composition throughout.
In Model 1, when two atoms are touching, a ______ is holding them together.
In Model 1, when two atoms are touching, a ______ is holding them together.
According to Model 1, the letters R, Sq, and T in the codes represent different types of ______.
According to Model 1, the letters R, Sq, and T in the codes represent different types of ______.
In the sample of SqR3 & TSq in Model 1, there are two different types of ______ present.
In the sample of SqR3 & TSq in Model 1, there are two different types of ______ present.
In Model 1, a visual representation shows that a molecule of TSq2R contains three ______.
In Model 1, a visual representation shows that a molecule of TSq2R contains three ______.
Based on Model 1, a ______ can be either a single atom or a combination of atoms bonded together.
Based on Model 1, a ______ can be either a single atom or a combination of atoms bonded together.
Model 1 illustrates that RSq is a ______ because it consists of two or more different types of atoms chemically bonded together.
Model 1 illustrates that RSq is a ______ because it consists of two or more different types of atoms chemically bonded together.
According to the models, the combination T & RSq & R represents a ______ since T, RSq, and R are not chemically bonded.
According to the models, the combination T & RSq & R represents a ______ since T, RSq, and R are not chemically bonded.
Consider a container with only Sq atoms. This is a ______ because only one type of atom is present.
Consider a container with only Sq atoms. This is a ______ because only one type of atom is present.
In chemical formulas, the small numbers or ______ indicate how many atoms of each element are in the compound.
In chemical formulas, the small numbers or ______ indicate how many atoms of each element are in the compound.
When atoms are touching in a drawing representing a compound, it indicates they are chemically ______, which the code communicates by writing the element symbols next to each other.
When atoms are touching in a drawing representing a compound, it indicates they are chemically ______, which the code communicates by writing the element symbols next to each other.
The use of an ampersand (&) in a sample code typically indicates the presence of a ______ of multiple substances, rather than a single pure substance.
The use of an ampersand (&) in a sample code typically indicates the presence of a ______ of multiple substances, rather than a single pure substance.
A substance is classified as a ______ substance when all the particles in a drawing are identical.
A substance is classified as a ______ substance when all the particles in a drawing are identical.
Matter is classified as a ______ if there are different types of particles present.
Matter is classified as a ______ if there are different types of particles present.
The codes (chemical formulas) for pure substances are different from those for mixtures because they show a fixed ratio of elements, whereas mixtures may have ______ varying compositions.
The codes (chemical formulas) for pure substances are different from those for mixtures because they show a fixed ratio of elements, whereas mixtures may have ______ varying compositions.
______ are defined as pure substances made from only one type of atom.
______ are defined as pure substances made from only one type of atom.
______ are defined as pure substances made from two or more types of atoms.
______ are defined as pure substances made from two or more types of atoms.
Flashcards
Atom
Atom
The smallest unit of an element that retains its chemical properties.
Molecule
Molecule
Two or more atoms held together by chemical bonds.
Chemical Bond
Chemical Bond
The force that holds atoms together in a molecule.
Particle
Particle
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Atomic Symbols
Atomic Symbols
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Particles Can Be Molecules
Particles Can Be Molecules
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Particles Can Be Atoms
Particles Can Be Atoms
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Counting Particles
Counting Particles
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Element
Element
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Compound
Compound
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Physical separation
Physical separation
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Subscripts in Chemical Formulas
Subscripts in Chemical Formulas
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Touching Atoms in Formulas
Touching Atoms in Formulas
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Ampersand Use in Formulas
Ampersand Use in Formulas
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Pure Substance
Pure Substance
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Mixture
Mixture
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Element vs. Compound Formulas
Element vs. Compound Formulas
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Study Notes
- Matter can be pure or a mixture.
- The type of particles an object is made of determines its classification.
- The smallest chemical units of matter determine if something is classified as an element, compound, or mixture.
- The drawings in model 1 show atoms touching and it represents that they are held together by chemical bonds.
- Pure substances have identical particles.
- Mixtures have different types of particles present.
- Elements are pure substances made of only one type of atom.
- Compounds are pure substances made from two or more types of atoms.
- Physical separation methods don't require a chemical change.
- Chemical separation methods do require a chemical change where chemical bonds are broken and/or formed.
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Description
Understand the differences between pure substances and mixtures. Learn about elements, compounds, and the methods used to separate them. Explore the roles of chemical bonds in determining a substance's classification.
