Shadowing Practice: Why Are Elements Arranged This Way? | LESSON 4-The Periodic Table | Science in English - Learn English Speaking with Video
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Why are elements arranged this way?
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Take a look at the periodic table.
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There are many chemical elements, but they are not arranged randomly.
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Look at the horizontal rows, and then look at the vertical columns.
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What do you notice?
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Can you see a pattern?
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Let's find out why elements are arranged this way.
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Welcome to lesson four, an overview of the periodic table.
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In this lesson, we'll learn how chemical elements are arranged.
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We'll also explore element squares, periods, and groups.
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Finally, we'll use the periodic table to identify metals, non -metals, and noble gases.
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Alright, let's get started.
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First, let's look at our learning objectives.
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By the end of this lesson, you should be able to do three things.
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First, describe the principles tables used to arrange chemical elements.
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Second, identify information in an element square, and explain periods and groups.
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Third, use the periodic table to identify metals, nonmetals, and noble gases.
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Keep these objectives in mind as we go through the lesson.
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Now, let's begin.
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How are elements arranged?
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Let's take a closer look at the periodic table.
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The first principle is that elements are arranged in order of increasing nuclear charge.
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Next, let's look at periods.
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Elements in the same period have the same number of electron shells.
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Now, what about groups?
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Elements in the same group A have similar chemical properties.
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Notice the pattern.
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The periodic table helps us understand the relationships between elements.
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Now, let's look at an element square.
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Take a look at the element square for oxygen.
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At the top, we can see the atomic number.
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It is 8.
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The chemical symbol is O, and the element name name is oxygen.
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The atomic mass shown here is 16.
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So, one element square gives us several important pieces of information.
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Can you point to the atomic number?
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What about the chemical symbol?
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Can you find the element name and the atomic mass?
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Good job!
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Now, let's look at periods and groups.
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Let's start with periods.
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A period is a horizontal row in the periodic table.
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The period number tells us the number of electron shells in an atom of an element in that period.
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Now let's look at groups.
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A group is a vertical column.
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For the group A elements studied in this lesson, the group number corresponds to the number of electrons in the outermost shell.
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Take a look at the diagram.
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Can you identify a period?
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Now, can you identify a group?
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Excellent.
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Let's move on to the different categories of elements.
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The periodic table helps us identify different categories of elements.
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First, let's look at metals.
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Examples include iron, copper, and aluminium.
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Next, we have nonmetals.
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Examples include oxygen, sulfur, and chlorine.
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Finally, let's look at noble gases.
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These include helium, neon, and argon.
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Notice that these categories occupy different regions of the periodic table.
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Now, let's use the table to classify some elements.
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Alright, it's your turn.
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Take a look at these symbols, F -E -O -N -E -C -U -C -L and H -E.
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First, find each element on the periodic table.
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Next, identify its period and group.
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Then, classify it as a metal, a non -metal, or a noble gas.
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Now, work with a partner and explain your answers.
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Remember, don't just give the answer.
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Explain how you used the periodic table.
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Excellent work.
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Let's review the key ideas.
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Finally, let's review what we've learned today.
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First, elements are arranged in order of increasing nuclear charge.
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Second, the periodic table has periods and groups.
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A period is a horizontal row.
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and a group is a vertical column.
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Elements in the same period have the same number of electron shells.
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Elements in the same group A have similar chemical properties.
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Finally, we can use the periodic table to identify metals, nonmetals, and noble gases.
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Before we finish, think about this question.
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Why do elements in the same group have similar chemical properties?
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Think about the electrons in the outermost shell.
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Remember, the periodic table is more than a list of elements.
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It helps us understand patterns and relationships between them.
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Great job today.
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Keep practicing your science English, and I'll see you in the next lesson.
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Vocabulary and speaking notes for this lesson
This speaking lesson is built on the video “Why Are Elements Arranged This Way?”. The speaker keeps coming back to these words: element, table, periodic, period, identify. This video has 85 sentences and 697 words to shadow. The speech runs for 5:41. The speaker talks at a steady 123 words per minute, a comfortable pace for shadowing. Only 77% of the words are among the 3,000 most common in English, so the vocabulary is demanding.
Key vocabulary in this video
15 words from the video worth learning, with pronunciation and meaning:
| Word | Pronunciation | Meaning |
|---|---|---|
| element noun | /ˈɛləmənt/ | One of the simplest or essential parts or principles of which anything consists, or upon which the constitution or fundamental powers of anything are based. |
| periodic adjective | /ˌpɪɹiˈɑdɪk/ | Relative to a period or periods. |
| arrange verb | /əˈɹeɪnd͡ʒ/ | To set up; to organize; to put into an orderly sequence or arrangement. |
| lesson noun | /ˈlɛs.ən/ | A section of learning or teaching into which a wider learning content is divided. |
| shell noun | /ʃɛl/ | The calcareous or chitinous external covering of mollusks, crustaceans, and some other invertebrates. |
| noble adjective | /ˈnoʊbəl/ | Having honorable qualities; having moral eminence and freedom from anything petty, mean or dubious in conduct and character. |
| atomic adjective | /əˈtɑː.mɪk/ | Of or relating to atoms; composed of atoms; monatomic. |
| symbol noun | /ˈsɪmbəl/ | A character or glyph representing an idea, concept or object. |
| oxygen noun | /ˈɑksɪd͡ʒən/ | The chemical element (symbol O) with an atomic number of 8 and relative atomic mass of 15.9994. It is a colorless and odorless gas. Sometimes called elemental… |
| vertical adjective | /ˈvɝ.tɪ.kəl/ | Standing, pointing, or moving straight up or down; parallel to the local direction of gravity; along the direction of a plumb line; perpendicular to something… |
| horizontal adjective | /ˌhoɹəˈzɑn.təl/ | Perpendicular to the vertical; parallel to the plane of the horizon; level, flat. |
| electron noun | /ɪˈlɛk.tɹɑn/ | The subatomic particle having a negative charge and orbiting the nucleus; the flow of electrons in a conductor constitutes electricity. |
| objective noun | /ɒbˈd͡ʒɛk.tɪv/ | A material object that physically exists. |
| principle noun | /ˈpɹɪn.sɪ.pəl/ | A fundamental assumption, fundamental law or guiding belief. |
| column noun | /ˈkɒləm/ | A solid upright structure designed usually to support a larger structure above it, such as a roof or horizontal beam, but sometimes for decoration. |
Phrasal verbs you will hear
| Word | Meaning |
|---|---|
| find out verb | To discover, as by asking or investigating. |
| go through verb | To travel from one end of something to the other. |
Sentences worth repeating
Short, complete lines from the video that you can reuse in everyday conversation:
- What do you notice?
- Can you see a pattern?
- Let's find out why elements are arranged this way.
- Can you point to the atomic number?
- Can you identify a period?
Grammar in this video
The structures the speaker uses most, with the exact words from the video:
| Structure | In the video |
|---|---|
| Passive voice be + past participle — the focus is on what happens, not who does it | are not arranged · are arranged |
| Future with “will” will + verb — a decision, promise or prediction | we'll learn · We'll also explore · we'll use |
Pronunciation to watch
The speaker uses 6 contractions and reduced forms, such as we'll, don't, I'll. Say them the short way, as you hear them.
- Long words — get the stress right: periodic /ˌpɪɹiˈɑdɪk/, horizontal /ˌhoɹəˈzɑn.təl/, aluminium /ˌæl.(j)uˈmɪn.i.əm/
How to practise with this video
- Listen to the whole video once without speaking and note the words you do not know.
- Shadow it sentence by sentence at normal speed, repeating each one until your rhythm matches the speaker.
- Record yourself and compare with the original, paying attention to words like element, periodic, arrange.
What is the Shadowing Technique?
Shadowing is a science-backed language learning technique originally developed for professional interpreter training and popularized by polyglot Dr. Alexander Arguelles. The method is simple but powerful: you listen to native English audio and immediately repeat it out loud — like a shadow following the speaker with just a 1–2 second delay. Unlike passive listening or grammar drills, shadowing forces your brain and mouth muscles to simultaneously process and reproduce real speech patterns. Research shows it significantly improves pronunciation accuracy, intonation, rhythm, connected speech, listening comprehension, and speaking fluency — making it one of the most effective methods for IELTS Speaking preparation and real-world English communication.