Periodic3’s blog

Hey there!!!

Im Dr Barryington im a mad scientist here to teach you kids about the first 20 elements of the periodic table and show you a simple periodic which is easy to remember and also a Bohr model.

Element 1: Hydrogen                                

Element 2: Helium

Element 3: Lithium

Element 4: Beryllium

Element 5: Boron

Element 6: Carbon

Element 7: Nitrogen

Element 8: Oxygen

Element 9: Fluorine

 Element 10: Neon

Element 11: Sodium

Element 12: Magnesium

Element 13: Aluminium

Element 14: Silicon

Element 15: Phosphorus

Element 16: Sulphur

Element 17: Chlorine

Element 18: Argon

Element 19: Potassium

Element 20: Calcium

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The periodic table was created in 1829 by German chemist by the name of Johann Dobereiner .Mr Doberenier found a relationship between the first 55 elements according to their atomic masses.

In 1869, Dimitri Mendeleev put the elements in order from atomic mass, highest to lowest. He put the elements into family’s by a predicting what chemical properties could be in the unknown elements. When he discovered these elements he was lucky to be correct as these properties were equal to he’s predictions.

Another German chemist by the name of Lother Meyer constructed a similar table to the periodic table and the table Dimitri Mendeleev made.Lother Meyer made this table by, comparing physical properties of the elements by using atomic mass.Mr Meyer table went into printing in 1870 one year after Dimitri Mendeleev made he’s table. Even thought Meyer was not acknowledged as the creator of the periodic table he acknowledged as the “joint creator” of the periodic table.

Mendeleev

First 20 Elements

Hydrogen

Hydrogen is the first element in the periodic table and the most basic and common of all elements in the universe. Over 90% of all the atoms in the universe are hydrogen atoms and they are the lightest of all elements.

Helium

 Helium is the second element on the periodic table. A chemist Lockyear and Frankland named the element. They named it after the Sun and the Latin word "helios". Similar to hydrogen, helium is usually found as a gas and has no color or smell. Helium is found everywhere in the universe and is the second most common element, just like hydrogen

Lithium

Lithium is the third element of the periodic table and was discovered in 1817 by a chemist named Arfvedson. This is the first metal on the periodic table and its silver in colour. Lithium is never found alone in nature. It is always stuck to other elements. Scientists use the letter pair "Li" to represent lithium in chemical equations.

Beryllium

Beryllium is the fourth element of the periodic table and was discovered and named in 1798 by a chemist named Vaquelin.  Purified Beryllium is a grey steel-like metal and is very poisonous. It is a non magnetic metal which can be used in electronic devices. The chemical symbol for beryllium is “Be”. Like lithium, beryllium is never found alone and is always combined with other elements.

Boron

Boron is number five on the periodic table.  People have used boron for thousands of years, but boron wasn't tested and named until 1808 by Sir Humphry Davy, Guy Lussac and another scientist named Theonard who also named boron.  Boron is also a very poor conductor of energy.

Carbon

 Carbon is the sixth element in the periodic table. All life on Earth depends on carbon. It is in nearly every biological compound that makes up our bodies. When you breathe out, its carbon combined with oxygen.  Carbon has been known to man for thousands of years. Carbon is a stable element and can be found alone.

Nitrogen

Nitrogen is the seventh element of the periodic table. Like carbon and oxygen, it is very important in most of the compounds that allow life to exist. 80% of the earth’s atmosphere is nitrogen gas. Nitrogen is a clear odourless gas .It was named by a chemist named Chaptal.

Oxygen

Oxygen is number 8 on the periodic table. You need oxygen to survive, as do all other living organisms. 20% of the earth’s atmosphere is oxygen and is very reactive.  Oxygen is odourless and colourless.

Fluorine

Fluorine is the 9^th element of the periodic table. Fluorine is the first element in the family of halogen gases. Fluorine is a yellowish gas which is very dangerous.

It is a highly reactive element.

Neon

 The gas is placed in glass tubes and an electric current is sent through the gas. When excited, neon enters a plasma state and glows red. Neon is the 10^th element of the periodic table and the second of the noble gases. It is highly non-reactive because of its electron configuration. The chemical symbol for neon is “Ne”.

Sodium

Sodium is a member of the alkali metal like potassium and lithium. It was isolated and named by a chemist named Davy. When sodium is purified it becomes a silvery bright metal. Sodium also floats in water.

Magnesium

Magnesium is in the family of alkali earth metals with calcium and beryllium. It is a very light metal and good for using to create alloy metals. It may hard to believe but magnesium is very important in your diet you need it to live a healthy life.

Aluminium

It is 13^th on the periodic table. When aluminium is combined with other metals it becomes very strong. It is also lightweight and non-toxic. Aluminium is located in the same column of the periodic table with boron.  

Silicon

You will find silicon below carbon in the third row of the periodic table. Silicon has a similar makeup to carbon in the way its electrons are arranged. When purified, it is a metallic looking and greyish crystal.  It looks shiny like a metal but silicon is not a metal.

Phosphorus

Phosphorus is very reactive. When isolated and pure, phosphorus is clear and almost see through. Phosphorus is number 15 on the periodic table and is right under nitrogen.

Sulphur  

Sulphur is bright yellow in colour and it smells really bad. Sulphur is mainly found around volcanoes and hot springs. It is number 16 on the periodic table an is located under oxygen. At normal temperatures it is non-reactive.

Chlorine

It's not clear like other gases it has a green tint to it. Chlorine is highly reactive.  It is the 2^nd halogen gas on the periodic table. It is number 17 on the periodic table and the chemical symbol for chlorine is “CI”.

Argon

Argon is the most common inert gas on Earth. Argon makes up a over one percent of our atmosphere.  It is scentless and colourless.  It is number 18 on the periodic table.

Potassium

The first element of the fourth row is potassium. It is named after the substance is potash. The name potassium comes from a substance called Potash. When isolated potassium is a soft metal silver in colour. The chemical for potassium is “K”.

Calcium

Calcium helps your bones stay strong which helps support your body weight. Your nervous system also uses calcium to help transmit impulses through your body. When purified calcium is a hard silver coloured metal. You will find calcium in the second column of the period table with other elements including beryllium and magnesium.

Molecules:

Molecules are atoms joined together they are crystal and they still attract each other until something breaks them apart.Molecules have a formula that show us what are in these atoms molecules. Atoms do not function on there own they are found in molecules or lattices.

Compounds:

Compounds are made when 2 elements not the same kind mix together to make a compound. Water contains millions of the h20 and it also includes molecules and grain of salt. Compounds can be a solid object (element) also compounds can be found in liquids, gases and sometimes in plasmas. Compounds break down when there is a lot of heat using force against it.

Mixtures:

Mixture is chemical substance created when 2 or could be more different materials fuse and it doesn’t have a chemical reaction. Some objects or materials can’t combine together. Mixtures also can mix like elements and compounds change in the mixture is a melting point. Mixtures can be broken apart by mechanical means.

Quartzcrystal

Atomic Numbers

Atomic number = number of protons = number of electrons

Mass number = number of protons + number of neutrons

These numbers can be shown as mass number 1a > 1a

The symbol of the element >F

Atomic number: a>a

This indicates that the atom is fluorine and has: a protons and 9 electrons 10 neutrons equals to (19-9=10)

Helium