Formation Of New Substance Vocabulary Test

2.

Those characteristics that can observed when a chemical reaction changes the identity of the substance, such as potential to rust, corrode, or combust.

Chemical Property
Physical Property
Property
Evidence of Chemical Reactions

Correct Answer

A. Chemical Property

Explanation

Chemical properties are characteristics that can be observed when a chemical reaction changes the identity of a substance. These properties include the potential of a substance to rust, corrode, or combust. Unlike physical properties, which describe the appearance or state of a substance, chemical properties involve the transformation of the substance at a molecular level. Therefore, the given answer, "Chemical Property," correctly describes the characteristics observed when a chemical reaction changes the identity of a substance.

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3.

To cause a solid substance to be separated from a solution.

Chemical Reaction
Precipitate
Compound
Subscript

Correct Answer

A. Precipitate

Explanation

When a solid substance is separated from a solution, it is called precipitation. This process occurs when two or more substances react chemically, causing the formation of a new compound that is insoluble in the solvent. The insoluble compound then appears as a solid precipitate, which can be separated from the solution through filtration or other methods. Therefore, "Precipitate" is the correct answer as it directly relates to the process of separating a solid substance from a solution.

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4.

A combination of chemical symbols showing the atoms of which a substance is made and their proportions.

Subscript
Chemical Formula
Molecule
Chemical Property

Correct Answer

A. Chemical Formula

Explanation

A chemical formula is a combination of chemical symbols that represents the atoms present in a substance and their proportions. It provides information about the elements and their ratios in a compound. By using chemical symbols and subscripts, a chemical formula gives a concise representation of the composition of a substance. It is an essential tool in chemistry for identifying and describing different compounds.

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5.

A number written just below the line that shows how many atoms of an element are present in the formula.

Molecule
Compound
Subscript
Chemical Formula

Correct Answer

A. Subscript

Explanation

A subscript is a number written just below the line that shows how many atoms of an element are present in the formula. In chemical formulas, subscripts indicate the ratio of atoms in a molecule or compound. For example, in the chemical formula H2O, the subscript 2 indicates that there are two hydrogen atoms for every one oxygen atom. Therefore, the correct answer is subscript.

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6.

The smallest particle of a compound that can exist on its own and keep its properties.

Molecule
Atom
Element
Compound

Correct Answer

A. Molecule

Explanation

A molecule is the smallest particle of a compound that can exist on its own and keep its properties. It consists of two or more atoms chemically bonded together. This distinguishes it from an atom, which is the smallest unit of an element that retains its chemical properties. An element is a pure substance made up of only one type of atom. A compound, on the other hand, is a substance composed of two or more different elements chemically bonded together. Therefore, the correct answer is molecule.

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7.

Which of the following is NOT evidence of a chemical reaction?

Color change
Temperature change
Production of gas
Volume decreases

Correct Answer

A. Volume decreases

Explanation

A decrease in volume is not typically considered evidence of a chemical reaction. Chemical reactions often involve the rearrangement of atoms and molecules, resulting in the formation of new substances with different properties. Color change, temperature change, and production of gas are more commonly observed as evidence of a chemical reaction, indicating a change in the chemical composition or structure of the substances involved. However, a decrease in volume could be a result of physical processes such as compression or evaporation, rather than a chemical reaction.

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8.

Made from two or more elements that are chemically combined, is not separated by physical means into other substances, and has different properties than the original elements that formed it.

Subscript
Element
Chemical formula
Compound

Correct Answer

A. Compound

Explanation

A compound is made from two or more elements that are chemically combined. It cannot be separated by physical means into other substances and has different properties than the original elements that formed it. In other words, a compound is a substance that is formed when atoms of different elements chemically bond together, creating a new substance with its own unique properties.

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9.

Those characteristics that can be observed without changing the identity of the substance such as size, shape, density, hardness, color, and state of matter

Physical Property
Chemical Property
Chemical reaction
Physical Change

Correct Answer

A. Physical Property

Explanation

The given characteristics, such as size, shape, density, hardness, color, and state of matter, are all examples of physical properties. Physical properties can be observed without changing the identity of the substance. They describe the inherent qualities of a substance and can be measured or observed without any chemical reactions taking place.

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10.

A change without forming a new substance such as a different size or state of matter

Chemical Change
Physical Change
Chemical reaction
Physical reaction

Correct Answer

A. Physical Change

Explanation

A physical change refers to a change in the physical properties of a substance, such as its size, shape, or state of matter, without forming a new substance. In this case, the given explanation aligns with the definition of a physical change as it mentions that the change does not involve the formation of a new substance.

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11.

A change that alters the identity of a substance resulting in a new substance or substances with different properties

Chemical Change
Physical Change
Chemical reaction
Physical reaction

Correct Answer

A. Chemical Change

Explanation

A chemical change refers to a process in which the identity of a substance is altered, resulting in the formation of new substances with different properties. This change typically involves a chemical reaction, where chemical bonds are broken and new bonds are formed. Unlike physical changes, which only affect the physical properties of a substance (such as shape, size, or state), a chemical change leads to the creation of entirely new substances.

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Formation Of New Substance Vocabulary Test

The characteristics or qualities of a substance: physical and chemical.

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Those characteristics that can observed when a chemical reaction changes the identity of the substance, such as potential to rust, corrode, or combust.

To cause a solid substance to be separated from a solution.

A combination of chemical symbols showing the atoms of which a substance is made and their proportions.

A number written just below the line that shows how many atoms of an element are present in the formula.

The smallest particle of a compound that can exist on its own and keep its properties.

Which of the following is NOT evidence of a chemical reaction?

Made from two or more elements that are chemically combined, is not separated by physical means into other substances, and has different properties than the original elements that formed it.

Those characteristics that can be observed without changing the identity of the substance such as size, shape, density, hardness, color, and state of matter

A change without forming a new substance such as a different size or state of matter

A change that alters the identity of a substance resulting in a new substance or substances with different properties