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Why is Fluorine in the group 7 of the periodic table? Which element, Fluorine or Chlorine, has a higher electronegativity? Explain your answer.

Group 7 of the periodic table contains all the elements known as halogens. They all have 7 valence electrons (hence group 7!) in their outer shell (insert diagram or prop to show what the outer shell signifi...
CS
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What is a Group 1 Element?

Group one elements are all metals. They are known as the Alkaline Metals. All of these element atoms have one electron on their outer shell. This means that, when they react, they lose this one electron to g...
LH
Answered by Lara H. • Chemistry tutor
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When should I use the accusative case?

The accusative is used for the direct object of a sentence. The direct object is the word (normally a noun) that receives the action of the verb. Example:Der Hund frisst den Toast - The dog eats the toastHer...
TB
Answered by Tom B. • German tutor
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What are the basic differences between Chinese and English grammar?

One of the differences between Chinese and English grammar is that in Chinese, we do not use 'tenses' in the same way as in English. In other word, there is no such things as 'ed,' 'has' 'had,' 'shall be,' e...
JY
Answered by Jessie Y. • Mandarin tutor
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Outline the differences between arteries and veins? (6) marks- 3 for each

Arteries and veins are the "tubes" that carry blood around the body.Artieries have thick outer walls in order to cope with the blood passing through being under such high pressure generated by the ...
AF
Answered by Amber F. • Biology tutor
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