Chemical Changes And Structures-Trends In The Periodic Table printable pdf download

Chemical Changes And Structures-Trends In The Periodic Table

Higher Chemistry

Unit 1 Chemical Changes and Structure-Trends in the Periodic Table homework

1. Attempts have been made to make foods healthier by using alternatives to

traditional cooking ingredients. An alternative to common salt contains potassium

ions and chloride ions.

(a) Write an ion-electron equation for the first ionisation energy of potassium.

(b) Explain clearly why the first ionisation energy of potassium is smaller

than that of chlorine.

2. (a) Describe and explain the trend in atomic size from lithium to caesium?

(b) The electronegativities of elements in the third period are listed in the data book.

Why is no value provided for the noble gas, argon?

3. The first ionisation energy of an element is defined as the energy required to

remove one mole of electrons from one mole of atoms in the gaseous state.

The graph shows the trend in first ionisation energies of the Group 1 elements.

Clearly explain why there is a decrease in the ionisation energy when you go down

this group.

Chemical Changes And Structures-Trends In The Periodic Table