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Explain the electronic configuration of Sodium (Na) and how this relates to its position in the periodic table.

Firstly we must use the periodic table to look at the number of protons (11) contained within a sodium atom. This tells us how many electrons are contained within the shells of that atom as these two are alw...
LS
Answered by Luke S. • Chemistry tutor
18993 Views

Est-ce qu’il est question simplement de se relaxer en vacances ? Pourquoi/ pourquoi pas ?

In order to get top grades in this essay, there must be a clear structure to it. This would consist of an introduction which should include three of the following: 1) it must start with a brief sentence intr...
LM
Answered by Luke M. • French tutor
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In Spanish, how do we know whether to use the preterite tense or the imperfect tense?

To start with, the preterite is used in two main cases: is the tense which you use to say (1) what you did or (2) what happened . To form the preterite of regular verbs, remove the –ar, –er or –ir from the i...
RD
Answered by Rocio D. • Spanish tutor
2616 Views

find all the roots to the equation: z^3 = 1 + i in polar form

1st write 1+ i in polar form, sketch a diagram to find the angle ( =pi/4) and find the modulus ( sqrt(2))z^3 = Sqrt(2) E^ipi/4This is true for all equivalent solutions (add 2kpi) z^3 = sqrt(2)e^(pi/4 +2kpi)i...
RM
11181 Views

How do I know which out of the Sine and Cosine rule I should use?

If you look at the formulae for the Sine and Cosine rules you'll see that the Sine rule involves two angles and two sides and the Cosine rule involves one angle and three sides.So have a look at the problem ...
JH
Answered by Julian H. • Maths tutor
5716 Views