Chemistry Basics Quiz

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Questions and Answers

Which of the following is an example of a chemical property?

  • Density
  • Boiling point
  • Melting point
  • Flammability (correct)

An element can be broken down into simpler substances.

False (B)

What is the formula for density?

Density = Mass/Volume

A substance made of hydrogen and oxygen is called ________.

<p>water</p> Signup and view all the answers

Match the following terms with their correct definitions:

<p>Chemical Property = Describes how a substance reacts with others Compound = A substance made of two or more different elements Density = Mass per unit volume of a substance Electron = Negatively charged particle outside the nucleus</p> Signup and view all the answers

Which of the following groups contains highly reactive elements?

<p>Alkali metals (A)</p> Signup and view all the answers

Heterogeneous mixtures have components that are uniformly distributed.

<p>False (B)</p> Signup and view all the answers

What is an ion?

<p>An atom or molecule that has gained or lost electrons, resulting in a charged particle.</p> Signup and view all the answers

Air is an example of a __________ mixture.

<p>homogeneous</p> Signup and view all the answers

Match the following terms with their definitions:

<p>Group = A vertical column in the periodic table Homogeneous = Components are uniformly distributed Isotope = Atoms of the same element with different neutrons Ion = A charged particle due to electron gain or loss</p> Signup and view all the answers

What type of compound is formed when electrons are transferred from a metal to a non-metal?

<p>Ionic Compound (A)</p> Signup and view all the answers

Metalloids possess properties that are exclusively those of metals.

<p>False (B)</p> Signup and view all the answers

Name an example of a highly malleable substance.

<p>Gold</p> Signup and view all the answers

A __________ is a combination of two or more substances that are not chemically bonded.

<p>mixture</p> Signup and view all the answers

Match the following states of matter with their description:

<p>Solid = Definite shape and volume Liquid = Definite volume but no definite shape Gas = Neither definite shape nor volume Plasma = Ionized gas with free electrons</p> Signup and view all the answers

Which of the following correctly defines a molecular compound?

<p>A compound made up of two or more non-metal atoms that share electrons through covalent bonds. (D)</p> Signup and view all the answers

All metals are known to conduct heat and electricity poorly.

<p>False (B)</p> Signup and view all the answers

What is the role of neutrons in the nucleus of an atom?

<p>To help stabilize the nucleus.</p> Signup and view all the answers

In a Carbon-12 atom, the number of neutrons is ___.

<p>6</p> Signup and view all the answers

Which of the following statements about protons is true?

<p>Protons are found in the nucleus of an atom. (D)</p> Signup and view all the answers

Salt dissolves in oil, making a solution.

<p>False (B)</p> Signup and view all the answers

What term describes a homogeneous mixture formed when a substance dissolves in another?

<p>Solution</p> Signup and view all the answers

A ______ substance can dissolve in a solvent to form a solution.

<p>soluble</p> Signup and view all the answers

Match the following examples with their corresponding terms:

<p>Sugar = Solubility Saltwater = Solution Rough = Texture Glass = Texture</p> Signup and view all the answers

Flashcards

Chemical Property

Describes how a substance reacts with other substances to form new substances. This property can only be observed during or after a chemical change.

Compound

A substance made of two or more different elements that are chemically bonded together.

Density

The amount of mass per unit volume of a substance. It tells us how tightly packed the particles are.

Electron

A negatively charged particle found outside the nucleus of an atom.

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Element

A pure substance made up of only one type of atom. Elements cannot be broken down into simpler substances.

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What are the elements in the same vertical column in the periodic table called?

A vertical column in the periodic table. Elements in the same group share similar chemical properties.

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Heterogeneous mixture

A mixture where the components are not uniformly distributed and can be seen or separated easily.

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Homogeneous mixture

A mixture where the components are uniformly distributed and appear as a single phase.

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What is an ion?

An atom or molecule that has gained or lost one or more electrons, resulting in a charged particle.

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What are isotopes?

Atoms of the same element that have the same number of protons but a different number of neutrons.

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What are ionic compounds?

A substance formed when electrons are transferred from a metal to a nonmetal, creating positively and negatively charged ions that attract each other.

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Lustre - What does it describe?

The shine or reflective quality of a substance. Metals are usually shiny.

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What is a metalloid?

A substance that has properties of both metals and nonmetals.

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What's a mixture?

A combination of two or more substances that are not chemically bonded. There are two types: homogeneous (uniform) and heterogeneous (distinct parts).

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What is malleability?

The ability of a substance to be hammered or rolled into thin sheets.

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What are metals?

Elements that are typically shiny, good conductors of heat and electricity, and can be hammered into different shapes.

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What is a molecular compound?

A compound made of two or more non-metal atoms that share electrons through covalent bonds.

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What is a neutron?

A neutral subatomic particle found in the nucleus of an atom. It helps stabilize the nucleus.

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What are non-metals?

Elements that are typically poor conductors of heat and electricity and are brittle in solid form.

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What is a period on the periodic table?

A horizontal row in the periodic table. Elements in the same period have the same number of electron shells.

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What is a proton?

A positively charged subatomic particle found in the nucleus of an atom.

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What is solubility?

The ability of a substance to dissolve in a solvent to form a solution.

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What is a solution?

A homogeneous mixture formed when a substance dissolves in another.

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What is texture?

The feel, appearance, or consistency of a surface or substance.

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How does the number of protons define an element?

The number of protons in an atom determines the element.

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