Prática de Shadowing: KS3 Chemistry - The periodic Table - Aprenda a falar inglês com vídeo

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In this video we're going to learn about the periodic table.
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So we'll cover what the periodic table tells us about the structure of atoms in different elements, how the table organises elements into metals and non-metals,
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what groups and periods are, and then also how patterns in reactions can be predicted using the periodic table.
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Let's begin by looking at what the periodic table tells us about different elements.
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Now the periodic table organises all of the known elements, and everything in the universe is created from different combinations of the elements in this table.
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Each element is shown in a separate box, so for instance this box shows copper and this one shows oxygen.
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If we use sodium as an example, we can see that every box contains three pieces of key information.
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Firstly we can see the one or two letter symbol for each element, in this case it's Na which stands for sodium.
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Next we can also see the number of protons each atom of that element has.
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Then lastly we can see this larger number here
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which tells us the total number of protons plus neutrons in an atom of that element.
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So now let's move on to see how the periodic table organises elements.
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Just like a book the periodic table is read from left to right and from top to bottom, with the elements arranged in order of an increasing number of protons.
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Sometimes you might see a zigzag line running along here, and this line separates the metals, shown here in orange, from the non-netals here on the right, shown in blue.
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Now the table's organised into vertical columns called groups and horizontal rows called periods.
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So starting on the far left, we have group 1, then groups 2, 3, 4, 5, 6, and 7.
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And then at the end, rather than group 8, it goes to group 0.
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Group 1 elements are known as the alkali metals, whilst group 7 are the halogens, and group 0 are the noble gases.
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This block in the middle here are all metals, but you don't need to worry about their group numbers, so just remember to skip them when you're counting your groups.
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Then to finish up, let's take a look at how patterns in reactions can be predicted using the periodic table.
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The first thing to know is that the elements within a group usually all have similar chemical properties.
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As an example, all the elements in group 1 here react strongly with water, and they're all soft and shiny.
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Meanwhile, all the elements in group 0 are really unreactive, which basically means that they're very unlikely to react with anything else.
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There are also patterns within groups though.
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In the case of group 1, they become more reactive as you go down the group.
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What this means is that even though all the elements are reactive, the elements lower down in group 1 react much more strongly than those higher up in the group.
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For instance, when lithium reacts with water it just fizzes a bit, but when rubidium reacts with water it explodes violently.
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On the other hand, if we look at group 7, the elements become less reactive as you go down the group.
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So fluorine is the most reactive while astartine is the least reactive.
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If you haven't heard yet you can find all of our videos on our website cognito.org.
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You'll also find questions, flashcards, exam style questions and past papers.
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And we track all of your progress so that you always know what to study next.
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sign up for free by clicking here or browse our playlist here on YouTube.

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Vocabulário e dicas de fala para esta lição

Esta aula de conversação de nível C1 usa o vídeo “KS3 Chemistry - The periodic Table”. As palavras que mais se repetem: element, table, periodic, reactive, metals. Este vídeo tem 33 frases e 599 palavras para praticar shadowing. A fala dura 3:42. O falante fala em ritmo natural, cerca de 162 palavras por minuto, próximo de uma conversa do dia a dia. 84% das palavras estão entre as 3.000 mais comuns do inglês; vale a pena estudar o restante antes de começar.

Vocabulário principal deste vídeo

As 15 palavras mais avançadas do vídeo, com pronúncia e significado:

PalavraPronúnciaSignificado
periodic adjetivo/ˌpɪɹiˈɑdɪk/periódico
proton substantivo/ˈpɹoʊ.tɑn/próton, protão
atom substantivo/ˈætəm/átomo
sodium substantivo/ˈsəʊ.di.əm/sódio
predict verbo/pɹɪˈdɪkt/prever
alkali substantivo/ˈæl.kəˌlaɪ/álcali
flashcard substantivo/ˈflæʃˌkɑɹd/flash card, flashcard
fluorine substantivo/ˈflʊ(ə)ɹˌinflúor
halogen substantivo/ˈhæl.ə.d͡ʒən/halogênio
neutron substantivo/ˈnu.tɹɑn/nêutron, neutrão
rubidium substantivo/ˌɹuːˈbɪd.i.əm/rubídio
zigzag substantivo/ˈzɪɡ.zæɡ/ziguezague
lithium substantivo/ˈlɪθi.əm/lítio
browse verbo/bɹaʊz/observar
playlist substantivo/ˈpleɪˌlɪst/playlist

Phrasal verbs que você vai ouvir

PalavraSignificado
go down verbodescer
finish up verbofinalizar, terminar
run along verbopartir

Pronúncia para ficar de olho

O falante usa 8 contrações e formas reduzidas, como they're, don't, haven't. Diga-as na forma curta, do jeito que você ouve.

  • Os sons de “sh” e “zh”: flashcard /ˈflæʃˌkɑɹd/, combinations /kɑmbɪˈneɪʃənz/
  • Palavras longas — acerte a sílaba tônica: periodic /ˌpɪɹiˈɑdɪk/, rubidium /ˌɹuːˈbɪd.i.əm/, violently /ˈvaɪ(ə)ləntli/, combinations /kɑmbɪˈneɪʃənz/, horizontal /ˌhoɹəˈzɑn.təl/

Como praticar com este vídeo

  1. Ouça o vídeo inteiro uma vez sem falar e anote as palavras que você não conhece.
  2. Comece na velocidade 0,75×, faça shadowing frase por frase e volte à velocidade normal quando ficar fácil.
  3. Grave a sua voz e compare com o original, prestando atenção a palavras como periodic, proton, atom.

O que é a Técnica de Shadowing?

Shadowing é uma técnica de aprendizado de idiomas com base científica, originalmente desenvolvida para o treinamento de intérpretes profissionais. O método é simples, mas poderoso: você ouve áudio em inglês nativo e repete imediatamente em voz alta — como uma sombra seguindo o falante com 1-2 segundos de atraso. Pesquisas mostram melhora significativa na precisão da pronúncia, entonação, ritmo, sons conectados, compreensão auditiva e fluência na fala.

Técnica de shadowing: leia o guia completo passo a passo →