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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

Nonmetallic univalent element belonging to the halogens; usually a yellow irritating toxic flammable gas; a powerful oxidizing agent; recovered from fluorite or cryolite or fluorapatite.

emissions

/əˈmiSH(ə)n/

noun other

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

chlorine

/ˈklôrēn/

noun

chemical element of atomic number 17.

recently

/ˈrēs(ə)ntlē/

adverb

Just a while ago; not long ago.

appeared

/əˈpir/

verb

To seem to be.

element

/ˈeləmənt/

noun

essential or characteristic part.

experiments
noun other verb

scientific procedure. Tests performed to assess new ideas or theories. To create and perform tests to research something.

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

To find something new that was not known before.

searches

/sərCH/

noun other verb

act of searching for person or thing. Actions to find answers to a problem. To examine a person's clothing to find something.

because

/bēˈkəz/

conjunction

for reason that.

between

/bəˈtwēn/

adverb preposition

in space separating things. Among two or more people who share something.

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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