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Astatine - Periodic Table of Videos

354,447 views

Periodic Videos

Video Language:

  • English

Caption Language:

  • {{captionLanguage | language_name}} ({{captionLanguage}})

Accent:

  • English

Speech Time:

98%
  • 6:47 / 6:52

Speech Rate:

  • 124 wpm - Conversational

Category:

  • Science & Technology

Tags :

Intro:

Video Vocabulary

fluorine

/ˈflo͝orēn/

noun

chemical element of atomic number 9, poisonous pale yellow gas of halogen series.

emissions

/əˈmiSH(ə)n/

noun other

production and discharge of something. A substance (e.g. gas) released into the air.

chlorine

/ˈklôrēn/

noun

Greenish-yellow gas with a strong smell.

recently

/ˈrēs(ə)ntlē/

adverb

Just a while ago; not long ago.

appeared

/əˈpir/

verb

To be seen, become visible; come into sight.

element

/ˈeləmənt/

noun

essential or characteristic part.

experiments
noun other verb

scientific procedure. Tests performed to assess new ideas or theories. To try something new that you haven't tried before.

polonium

/pəˈlōnēəm/

noun

chemical element of atomic number 84, radioactive metal occurring in nature only as product of radioactive decay of uranium.

astatine

/ˈastəˌtēn/

noun other

chemical element of atomic number 85, radioactive member of halogen group. A highly unstable radioactive element (the heaviest of the halogen series); a decay product of uranium and thorium.

discovered

/dəˈskəvər/

verb

find unexpectedly or while searching.

searches

/sərCH/

noun other verb

act of searching for person or thing. Actions of trying to find someone or some things. To look for an answer or explanation to a problem.

because

/bēˈkəz/

conjunction

For a reason.

between

/bəˈtwēn/

adverb preposition

in space separating things. From one person, thing, or place, to another.

century

/ˈsen(t)SH(ə)rē/

noun

Period of 100 years.

halogens

/ˈhaləjən/

noun other

any of elements fluorine, chlorine, bromine, iodine, and astatine. Any of five related nonmetallic elements (fluorine or chlorine or bromine or iodine or astatine) that are all monovalent and readily form negative ions.

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