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How many covalent bonds do nitrogen atoms make and why?

Nitrogen makes 3 covalent bonds. It is in the second period of the periodic table and so has its outer electron in the second shell/energy level. This shell requires eight electrons in order to be filled....

Answered by Ronan t. • Chemistry tutor

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An atom of iron is represented as 56 Fe 26 Give the number of protons, neutrons and electrons in this atom of iron.

We see two numbers given for the description of an atom on the periodic, one larger than the other. The larger number is in reference to the atomic mass of the atom, which is the sum of the number of prot...

Answered by Jonas M. • Chemistry tutor

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Compare the structure between graphite and diamond

KeypointsEach diamond carbon is covalently bonded to 4 other carbonsEach graphite carbon is covalently bonded to 3 other carbonsDiamond is very hard due to its tertrahedral structureGraphite is made up of...

Answered by Hamza A. • Chemistry tutor

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C is a circle with equation x^2 + y^2 = 16. The point P = (3,√7) is on C. Find the equation of the tangent to C at the point P.

First, we note the centre of the circle is at the origin (0,0). Then we calculate the gradient of the line OP, the line connecting the origin to P. The gradient = change in y / change in x = (√7 - 0) / (3...

Answered by Daniel C. • Maths tutor

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How can I prepare for an unseen poetry question?

Preparing to write an essay on an unseen poem can seem challenging, especially as you cannot predict what the poem will be, or even what theme it will have or what period of time it will come from. Howeve...

Answered by Verity S. • English tutor

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