Podcast
Questions and Answers
Dmitri Mendeleev is credited with what contribution to the study of elements?
Dmitri Mendeleev is credited with what contribution to the study of elements?
- Discovering the first noble gas.
- Identifying the first radioactive element.
- Developing the concept of the atom.
- Organizing them into the periodic table. (correct)
Which characteristic is unique to elements?
Which characteristic is unique to elements?
- They can be broken down into simpler substances by chemical means.
- They cannot be broken down into simpler substances by chemical means. (correct)
- They are pure substances.
- They are composed of two or more different types of atoms.
What distinguishes a compound from an element?
What distinguishes a compound from an element?
- A compound can be separated by physical means.
- A compound cannot be broken down.
- A compound is composed of two or more different elements chemically combined . (correct)
- A compound consists of only one type of atom.
What is the key difference between a homogeneous mixture and a heterogeneous mixture?
What is the key difference between a homogeneous mixture and a heterogeneous mixture?
Which set of properties is characteristic of metals?
Which set of properties is characteristic of metals?
Which property is most typical of non-metals?
Which property is most typical of non-metals?
What term describes elements that possess properties of both metals and non-metals?
What term describes elements that possess properties of both metals and non-metals?
What is the most abundant metalloid and a key component in many types of rock?
What is the most abundant metalloid and a key component in many types of rock?
Why is the capitalization of letters important when writing element symbols?
Why is the capitalization of letters important when writing element symbols?
What is the chemical symbol for silver based on its Latin name?
What is the chemical symbol for silver based on its Latin name?
What is a primary use of silicon as a semiconductor/insulator?
What is a primary use of silicon as a semiconductor/insulator?
What key property makes hydrogen useful in certain applications, but also dangerous?
What key property makes hydrogen useful in certain applications, but also dangerous?
What makes plain iron less desirable than steel for many applications?
What makes plain iron less desirable than steel for many applications?
What is a notable hazard associated with chlorine gas?
What is a notable hazard associated with chlorine gas?
Where do diamonds come from?
Where do diamonds come from?
What effect does sodium have when it comes into contact with water or air?
What effect does sodium have when it comes into contact with water or air?
Ozone is composed of how many oxygen atoms?
Ozone is composed of how many oxygen atoms?
Which of the following is a direct application of semiconductors in modern technology?
Which of the following is a direct application of semiconductors in modern technology?
Which physical property of sodium is demonstrated when cutting it with a knife?
Which physical property of sodium is demonstrated when cutting it with a knife?
Why are pure elements rarely used in industrial applications?
Why are pure elements rarely used in industrial applications?
Which mixture is an example of a solid solution?
Which mixture is an example of a solid solution?
What is the most abundant element in the universe?
What is the most abundant element in the universe?
What property is most important for the use of chlorine as a disinfectant?
What property is most important for the use of chlorine as a disinfectant?
In the context of classifying matter, what distinguishes elements from mixtures?
In the context of classifying matter, what distinguishes elements from mixtures?
Why is steel stronger than iron?
Why is steel stronger than iron?
Which environmental factor causes plain iron to corrode?
Which environmental factor causes plain iron to corrode?
Which form of pure oxygen is known to be toxic?
Which form of pure oxygen is known to be toxic?
Why is silicon a useful component in devices like computers and smartphones?
Why is silicon a useful component in devices like computers and smartphones?
Which of the following is a characteristic property of metalloids?
Which of the following is a characteristic property of metalloids?
Which of the following is most likely to be found in a solid solution?
Which of the following is most likely to be found in a solid solution?
What is the primary reason for the flammability of hydrogen?
What is the primary reason for the flammability of hydrogen?
Ozone in the air is toxic, but what is its main molecular structure?
Ozone in the air is toxic, but what is its main molecular structure?
Why is the capitalization of element symbols important?
Why is the capitalization of element symbols important?
What is the Latin origin of the chemical symbol for silver (Ag)?
What is the Latin origin of the chemical symbol for silver (Ag)?
Why is silicon used in Silicon Valley?
Why is silicon used in Silicon Valley?
Flashcards
Periodic Table
Periodic Table
Organizes elements, discovered throughout history, all over the world.
Element
Element
A pure substance that cannot be chemically broken down.
Compound
Compound
A pure substance composed of two or more different elements.
Solutions
Solutions
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Mechanical Mixtures
Mechanical Mixtures
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Metals
Metals
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Non-metals
Non-metals
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Metalloids
Metalloids
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Silicon
Silicon
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Element Symbols
Element Symbols
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Iron
Iron
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Carbon
Carbon
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Hydrogen
Hydrogen
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Oxygen
Oxygen
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Sodium
Sodium
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Chlorine
Chlorine
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Study Notes
- SNC1W covers the topic of elements.
- The lessons are designed to familiarize students with the elements.
Agenda
- Activity to brainstorm what is already known about the periodic table.
- Record answers in fill-in-the-blank notes.
- Learn about the periodic table song
- There are two pages of scavenger hunts to familiarize elements.
Minds-on Activity: Periodic Table of the Elements
- The user will brainstorm what is already known about the periodic table.
- One group member will be the scribe.
- Make sure that every person in the group gets a chance to share their ideas.
Elements Defined
- Elements are pure substances that cannot be chemically broken down.
- Elements are made of one type of atom only.
- Dmitri Mendeleev said elements are the building blocks of the world.
- Dmitri Mendeleev said the periodic table is the guide to putting elements together.
The Periodic Table
- Organizes the elements known to humans.
- The elements have been discovered at various times throughout history.
Element vs Compound
- Elements cannot be broken down into a simpler chemical substance with physical or chemical means.
- Compounds are composed of two or more different elements.
Matter
- Matter is anything that has mass and occupies space.
- There are pure substances and mixtures.
- Pure substances have a constant and uniform composition, and particles cannot be separated by physical means.
- Elements cannot be chemically broken down.
- Compounds can be chemically broken down by combing two or more elements.
- Mixtures have a variable composition and separate by physical means.
- Homogenous mixtures have a uniform appearance but have 2 types of particles.
- Heterogenous mixtures consist of two or more "phases" that can be seen with the naked eye or a microscope.
Categories of Elements
- Metals, non-metals, and metaloids are types of elements.
Metals
- Most of the elements are metals.
- Metals are shiny and silver.
- They conduct electricity and heat
- They are malleable and ductile
- A mixture of two or more metals is called an alloy.
Non-metals
- Only 17 elements are non-metals.
- Non-metals are dull or brittle.
- They are non-conductive.
- Non-metals can be solid, liquid, or gas at room temperature.
Metaloids
- They have both metallic and non-metallic properties.
- They are solids.
- They look like metals (lustre).
- They are brittle and easily broken like non-metals.
- They conduct some electricity and are semiconductors.
Element Spotlight: Silicon
- Silicon is the most common metalloid.
- Pure silicon is shiny and grey.
- Pure silicon is brittle.
- It's the third most abundant element, hydrogen is the first, and oxygen is second.
- Silicon is used in many machines as an alloy, iron-silicon.
- It is also used in oil form for hair and makeup.
- Silicon is 40% of the mass of any rock.
Silicon Valley
- Technology hub located in Northern California.
- Organizations such as Youtube, Netflix, and Meta, and AI Developers are located in Silicon Valley.
- The area was a silicon mining company.
- Used in technology as it is a semiconductor/insulator
Element Symbols
- Consist of one, two, or three letters.
- The first letter is always capitalized.
- The 2nd and 3rd letters are not capitalized.
- "Co" stands for Cobalt, while "CO" represents the poisonous compound Carbon Monoxide
- "Ag" stands for Silver, which comes from the Latin name Argentum.
Common Elements
- Some common elements include iron, carbon, hydrogen, oxygen, sodium, and chlorine.
Iron
- Iron is very strong.
- Iron combined with carbon to make steel is even stronger.
- Plain iron corrodes easily in moist air, forming rust.
Carbon
- Exists in many forms including graphite, coal and diamonds.
- Graphite, coal and diamonds form underground when remains of organisms become compressed.
Hydrogen
- H is the most common element in the universe.
- H atoms are the simplest and lightest.
- Pure H is colorless, odorless, and lighter than air.
- It is extremely flammable.
Oxygen
- O makes up 21% of the air that is breathed.
- The oxygen gas that is breathed is in the form of two O atoms connected.
- Ozone (O3) is another form of pure oxygen, it's which is toxic to breathe.
Sodium
- Sodium reacts violently if it contacts air or water.
- It's so soft that it is easily cut with a knife.
- It melts at 98 degrees Celsius.
Chlorine
- Cl is a yellow-green gas at room temperature.
- High concentrations of Cl gas is toxic and quickly destroy lung tissue.
- At lower concentrations, chlorine is a very useful disinfectant.
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