big mon

[fozzies123]

last one 30d 5L any chemical substance with a valency of eight,is it octad???? many thanks

[JoolsTwo]

Octad - a group or series of 8. Answered below

[JoolsTwo]

I don't think that is the same clue as below, though Octad is a group or series of 8.

[fozzies123]

did not see the post below,as it came under international express but thanks

[ulysses100]

the valency of a substance is the number of free electrons in its outermost shell and , in this case, the answer is an octet

[fozzies123]

cannot be as ends in D

[ulysses100]

You didn't state any letters in your original question.
Go to a dictionary site and it will say that octet is a stable group of eight electrons ( a chemical term).

[fozzies123]

the d comes from the answer midlands,there for the answer is octad,and it could have been octet,but for the d,it was just a post to see if anyone had the same answer but thanks anyhow

[Hilston_46]

It's 5 letters: begins with an O from ERGO (Latin for hence or therefore) ends in D from LINDISFARNE (The alternative name for an island off the NE coast of Northumberland, also called Holy Island)

IMHO the clue is rubbish. OCTAD fits but means a group or set of eight. OCTET would be a better answer, meaning a stable group of eight electrons.

[cheshunt]

I have puy OCTAD. Think the clue lies in the word "valency". A noun meaning, element's power to combine. Hope this helps.

[teacher1]

My Collins says - octad: "an element with a valency of eight"