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Use your own knowledge to compare and contrast the physical and chemical properties of Transition metals and group 2 elements. Use examples to explain your answer.

Answer: Students should be able to list the typical properties of transition metals Physicalhigh melting point / DensityFormation of coloured compoundsFormation of ions w...

CK
Answered by Chris K. Chemistry tutor
2100 Views

An electron is emitted from a cathode in an electron gun, with a potential difference of 150kV. Find the velocity of the electron after it is accelerated and find the De Broglie wavelength.

V=J/C1.602×10^-19 ×150×10^3=1/2×m×v^2
v=(2×1.602×10^-19×150×10^3/9.11×10^-31)^1/2v=2.29×10^8 m/sλ=h/pλ=6.63×10^-34/2.29×10^8 × 9.11×10^-31λ=3.17×10^-12

AC
Answered by Adam C. Physics tutor
1522 Views

How can I show that two events are independent ?

Two events are independent if and only if the product of their own probabilities is equal to the probability of them both happening, that is :
A and B independent <=> P(AnB) = P(A)...

CR
Answered by Calyste R. French tutor
1707 Views

How would you analyse and use a source?

Analysing a Source Walkthrough
Circles of Inference (Use whiteboard feature)
Questions to address immediately (particularly if there is limited context to the source)
·        What is the s...

TB
Answered by Toby B. History tutor
1738 Views

Excess KCN(aq) is added to a solution of [Co(H2O)6]2+. Identify the complex ion formed and predict its shape and charge.

[Co(CN)6]4-CN has -1 charge so overall charge is -4. CN- is similar sized ligand to H2O so shape is unchanged and remains octahedral.

JJ
Answered by Jack J. Chemistry tutor
3498 Views

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