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Magnesium is in Group 2 of the Periodic Table. It has a number of naturally occurring isotopes, including 24Mg and 26Mg. (a) (i) Explain, in terms of the subatomic particles in the atoms, why 24Mg and 26Mg are isotopes.

Both isotopes of magnesium have 12 protons as shown by Mg's proton number in the periodic table. By definition an isotope is an atom with the same number of protons but differs in its number of neutrons. As ...
LC
Answered by Lewis C. • Chemistry tutor
9884 Views

Explain why the rate of reaction slows down above the enzyme's optimum temperature.

Chemical reactions occur faster at higher temperatures since at higher temperatures the enzyme is more likely to bump into the substrate more often and with a higher energy than at a lower temperature. The t...
YI
Answered by Yasmin I. • Biology tutor
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Why did 'Reconstruction' (1865-1877) fail?

A combination of economic and socio-political factors account for the failure of Reconstruction, which was signalled definitively following the Hayes Compromise of 1877. However, the most pervasive factor un...
JT
Answered by James T. • History tutor
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f(x) is defined by f(x) = 3*x^3 + 2*x^2 - 7*x + 2. Find f(1).

f(1) = 3 1^3 + 2 1^2 - 7*1 + 2 = 3 + 2 - 7 + 2 = 0
DM
Answered by Dragos M. • Maths tutor
3490 Views

What is 16^(3/2)

The rule for simplifying indices is to take them one at a time, so separate the problem into 16^(1/2)^3, which is 4^3, which is 64.
JB
Answered by Jonah B. • Maths tutor
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