Top answers

Explain the melting points of period 3 elements.

Going from Na to Si, the melting point increases. This is because from Na-Al, the charge of the metal ion and the number of delocalised electrons increases so the strength of the metallic bonding increases a...
AK
6539 Views

How do I form a 'si' clause in French?

In English, a sentence like 'If I were rich, I would buy a house.' is an example of an 'if' clause. It is used to describe a hypothetical situation; something that would happen if a certain condition is fulf...
ML
Answered by Molly L. • French tutor
3390 Views

Factorize the following expression and solve for x: X^2 +7X +10=0

Answer: (X+5)(X+2)=0 X=-5 or -2 We first look for to numbers that multiply together to make 10 (1 and 10, 2 and 5 are the only pairs) We choose the pair which also adds together to the 2nd term, 7. We can th...
JH
Answered by James H. • Maths tutor
4288 Views

Why does the breathing rate increase during exercise?

The breathing rate increases at the start of exercise then reaches a peak and plateaus during exercise. After exercise the breathing rate will gradually fall, but this may take several minutes. During exerci...
AM
Answered by Ayushi M. • Biology tutor
11135 Views

How should I structure an opinion essay in Spanish?

The easiest way to approach an essay is to follow the standard formula: “introduction + development + conclusion”. The number of paragraphs you should aim for will depend on the specific task. For example, f...
AS
Answered by Aida S. • Spanish tutor
4609 Views