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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

at recent time.

appeared

/əˈpir/

verb

To be seen, become visible; come into sight.

element

/ˈeləmənt/

noun

Essential or particular part of something.

experiments
noun other verb

scientific procedure. Tests performed to assess new ideas or theories. perform scientific experiment.

polonium

/pəˈlōnēəm/

noun

Radioactive metallic element that is similar to tellurium and bismuth; occurs in uranium ores but can be produced by bombarding bismuth with neutrons in a nuclear reactor.

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

To find something new that was not known before.

searches

/sərCH/

noun other verb

act of searching for person or thing. Actions of trying to find someone or some things. To examine a person's clothing to find something.

because

/bēˈkəz/

conjunction

For a reason.

between

/bəˈtwēn/

adverb preposition

in space separating things. In the space that separates two objects.

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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