ELEMENTS

DIEGO PEREZ

I-AKY REGLA

WHAT IS ?

It is a kind of matter composed of atoms of the same class

NATURE OR ARTIFICIALLY

Some elements found in nature and obtained from artificially

Examples of natural elements

Oxygen , Hydrogen , Lithium , etc.

Examples of artificial elements

Rutherfordio , Dubnium , Seaborgium , Bohrium , etc.

GROUPS

There are 4 types of groups: Alkali metals, halogens, transitional metals and noble gases.

NOBLE GASES

The noble gases are the chemical elements in group 18 of the periodic table. They are the most stable to have the maximum number of valence electrons

HALOGENS

All halogens have 7 electrons in their outer shells, giving them an oxidation number of -1.

ALKALI METALS

The alkali metals, found in group 1 of the periodic table, are very reactive metals that do not occur freely in nature. These metals have only one electron in their outer shell

TRANSITION METALS

There are a number of elements that are classified as transition metals. They occupy columns 3 through 12 of the periodic table.

VALENCE ELECTRONS

The nunber of electrons in the outermost electron orbit. Valence electrons do not equal the number protons.

ATOMIC NUMBERS

Is the number of protons found in the nucleus of an atom

NONMETALS

Non-metals are the elements in groups 4-6 of the periodic table. Non-metals are not able to conduct electricity or heat very well.

METALS

Metals are good conductors of electricity. Are the elements in elements 1-13.

The end