Top answers

Chemistry
A Level

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 neutr...

Answered by Lewis C. Chemistry tutor
7465 Views

How can I use an infrared spectrum with a mass spectrum to identify an unknown compound?

You’ll need to use both spectrums to pick out information and piece them together to identify the compound, similar to a puzzle. First, you could use the infrared spectrum to identify which functional gro...

Answered by Vania M. Chemistry tutor
1732 Views

Why does lithium have a higher melting point than sodium

Melting point decreases going from lithium to sodium because sodium is lower down group one therefore it has a greater number of shells. A greater number of shells means a greater atomic radius - a greate...

Answered by Jim O. Chemistry tutor
11992 Views

Why is the bond angle in an amide ion smaller than the bond angle in a molecule of ammonia?

The nitrogen atom in both NH3 and NH2- has 8 outer shell electrons. In NH3, 3 pairs of these electrons are used in covalent bonding to hydrogen atoms and the re...

Answered by Anna G. Chemistry tutor
12098 Views

What is a racemic mixture and why is it not optically active?

A racemic mixture contains a 50-50 mixture of two optical isomers. Optical isomers are identical in molecular structure but rotate the plane of polarized light in different directions (one rotates clockwi...

Answered by Labiba H. Chemistry tutor
8035 Views

We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo
Cookie Preferences