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Why does nuclear radius decrease and first ionisation energy increase across the period?

As we move across the period electrons occupy the same outer electron shell, having roughly the same distance to the nucleus. Moving across the period nuclear charge increases as the number of protons in the...
JM
Answered by James M. • Chemistry tutor
4114 Views

Magnesium chloride is an ionic compound and has a high melting point. Explain why magnesium chloride has a high melting point?

Magnesium atoms lose two electrons from its outer shell, thus form positvely charged ions with a charge of 2+. These 2 electrons are transferred to and gained by a diatomic molecule of chlorine atoms - each ...
HS
Answered by Heaja S. • Chemistry tutor
40067 Views

Describe the bonding and structure in solid sodium chloride

It is a giant lattice structure. Sodium ions (Na+) are positively charged and chloride ions (Cl-) are negatively charged. There is ionic bonding between - strong electrosatic forces of attraction between opp...
AK
Answered by Arushan K. • Chemistry tutor
8066 Views

What is meant by the term salt? And how would you confirm if the salt had chloride ions in?

Part 1: "A salt is is when the H + ion in an acid is replaced with a cation (e.g. a metal)" Part 2: You would use the silver nitrate test for halide ions. You add dilute nitric acid (which avoids g...
BQ
Answered by Brendan Q. • Chemistry tutor
3590 Views

Using the VSEPR theory, predict the shape of CCl4 and its approximate bond angles.

Draw out the lewis structure of CCl4 by counting the number of valence electrons on each atom. C=4, Cl=7 therefore total valence electrons is 4+(7x4)=32 and total valence electron pairs is 16. 2. Determine t...
AM
Answered by Amy M. • Chemistry tutor
64084 Views