헝가리 의대를 준비하기 위한 화학6

오늘은 화학입니다. 아마 매일 적는다면 격일로 물리와 돌아가며 적을 것 같습니다.

 

Molecules and molecular compounds

- Molecules and chemical formulas

 

- Chemical formula
- H2O is example, this shows how water composed. two hydrogen and one oxygen.
- Diatonic molecule
A molecule made up of two atoms
- Molecular compounds

Compounds composed with more than two types of atoms.

 

- Molecular and empirical formulas

 

- molecular formulas

Chemical formulas that indicate the actual numbers of atoms in a molecule.

- empirical formulas

Chemical formulas that give only the relative number of atoms of each type in a molecule.

 

- Picturing molecules

- structural formula

shows how does the molecular formula exsist in the real world.

 

Ions and iconic compounds

- if electrons are removed from or added to an atom, a charged particel called an ion is formed.

- an ion with a positive charge is a cation.

- a negatively charged ion is an anion