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Why do the atomic radii of the elements decrease across Period 3 from sodium to chlorine?

The atomic radius of an atom is the distance from the atom's nucleus to its outermost electron. Moving across Period 3, the number of protons in the nucleus increases - for example sodium has 11 protons, ...

AT
Answered by Amy T. Chemistry tutor
31986 Views

When should I conjugate the past participle when using the "avoir" auxilary.

When using the auxilary "avoir" the past participle's ending agrees both is gender and number with the direct object only when it is placed before the verbs' subject.  Here's an example: Le chat...

AD
Answered by Alice D. French tutor
2026 Views

How do you differentiate a function?

The differential of a function is defined by the expression: dy/dx = Lim(dx->0) of (f(x+dx)-f(x))/dx. For functions only involving powers of x, the differentioal can easily be calculated by timesing by...

MH
Answered by Max H. Maths tutor
3671 Views

What's the difference between "buono" and "bene"?

The difference between the words "buono" and "bene" is mainly in their position and so in their role in a sentence. While "buono" is used as an adjective (to describe a perso...

DT
Answered by Demetra T. Italian tutor
3059 Views

How do I critically evaluate a theory or field of psychology? (e.g. biological, behavioural, cognitive etc)

You must first make sure that you understand the main assumptions that are in line with the given theory. Then you should find studies or theorists that support them, and be able to explain how their find...

MS
Answered by Maja S. Psychology tutor
15059 Views

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