N level Sci Chem - Elements, Compounds and Mixtures, Atomic Structure

Good morning good morning,

Two topics coming right up in this post!

A summary of popular questions based on the topics:

Elements, Compounds and Mixtures

1. Distinguishing the diagrams for elements, compounds, mixtures
   Note:
   Elements can exist as atoms / molecules [Refer to question 1, diagram R and S respectively]
   
2. Common examples of mixtures - air, crude oil / petroleum / seawater / alloys e.g. brass, steel
3. Good to know: the definition of elements, compounds, mixtures as it will guide you towards identifying them. 

Video tutorial for elements, compounds, mixtures: N level Sci Chem - Elements Compounds Mixtures

Atomic Structure 

1. The three subatomic particles and their relative charges and approximate relative massess. 
2. 'Location' of the three  subatomic particles.
3. Define isotopes and describe similarity / differences in given isotopes
   (See Section B, question 1) 
4. Writing electronic configuration, drawing electronic structure of atoms and ions 
5. Describe the change when an atom becomes an ion. 
6. Understand how to write nuclide notation (refer to diagram below)
   
   

Video tutorial for atomic structure: N level Sci Chem - Atomic Structure

“Teachers can open the door, but you must enter it yourself.” — Chinese proverb

Till next time!