Periodic Table
Metals- Metal elements
Nonmetals- nonmetal elements
Metalloids- Both metal and nonmetal
Protons, Neutrons, and Electrons
Protons- Positive charge
Neutrons- No charge
Electrons- Negative charge
Father of the Periodic Table was Dmitri Mendeleev
Reactivity- The reactivity of the elements depends on the number of electrons in the outermost shell
Phosphorous is the least reactive one.
Fluorine is the most reactive non metal
18 Groups on the periodic table
The Alkali Metals group 1,
The Alkaline earth Metals Groups 2,
Transition metals group 3-12
Boron family group 13
Carbon family group 14
Nitrogen family group 15
Oxygen family group 16
Halogens group 17
Noble gases group 18
Atomic number, Atomic Mass and Mass Number
Atomic Number = Number of protons
Atomic Mass = Number of protons and neutron
I know the number of electrons because it is the same as the number of protons
Atoms
Valence Electrons are associated with an atom, and that can participate in the formation of a chemical bond; in a single covalent bond, both atoms in the bond contribute one valence electron in order to form a shared pair.
2,8,8,8,8….. Means only two atoms can go into the first ring then 8 in the rest of them
Balancing Electrons
Chemical & Physical Properties
A physical property is a characteristic of a substance that can be observed without changing it into another substance.
A chemical property is a characteristic of a substance that describes its ability to change into a different substance.
Color change
Gas (bubbles)
Unexpected Temperature change
Formation of a precipitation
A solid produced when two liquids chemical combined
Light
Credits:
Created with images by ost2 - "lab chemistry research" • sergey245x - "D.I. Mendeleyev"