Section 3 Flashcards
How many electrons is on each shell
How is it charged?
- 2 electrons
- 8 electrons
- 8 electrons and so on…
Negatively charged particle
When last shell is competed what kind of element is is
Stable element
Valence electron
Electrons in the outer shell of an atom
2 different chemical bonds that allow atoms to fill their outer shell
- covalent bond
- ionic bond
Covalent bond
Atoms share 1 or more of their valence electrons with other atoms
Covalent bonds could be double or single what does that mean (some are triple)
Single bond
1 electron is shared
Double bond
Sharing 2 pairs of electrons between 2 atoms
Ionic bond
Atoms gain or lose some of their valence electrons to become charged particles- ions
Ions are..
attracted to each other by their opposite charges
Ionic compound
Chemical compound composed of 2 or more ions
Metal atoms tend to ….. an electron
Tend to lose an electron
Ionisation
Process of losing or gaining electron
Ionic compound form when….
Metal + non metal
Covalent compound form when….
Non metal + non metal
What does actinic number tells you
How manat protons and electrons there are in an atom of the element
F.e H
1 proton
1 electron
Atomic group tells you
How many bonds atom can make H-1 Be- 2 B -3 C-4
What is solute
Substance devolving in solvent to form solution
Electronegativity
Tendency of some atoms to pull the shared electrons in a covalent bond towards themselves
Ability of atom to attract shared electron
From zero to high looking at the periodic table
Polar covalent bond
Electrons are NOT equally shared between atoms forming the bond (OH)
Hydrogen bond
Attraction of 2 polar molecules in which hydrogen attracted to an electronegative atom in 1 molecule is attracted to an electronegative atom in other molecule.
Polar molecule
Water for example
Non polar molecule
Fats
Water is good solvent because
It can bond with many polar molecules
Aqueous
Any solution in which water is the solvent
