What is an element?

In our science lesson today we discussed what an element is… Abdi has already conducted some research into this and thinks that there are 118 known elements.

Each element has some letters that represents the element. For example, the symbol for gold is Au… so if you see letters representing an element then you can look this up online.

Have a look at the interesting pictures and answer the questions below;

What is an element?

What is the periodic table?

Is Abdi right? How many elements are there on the periodic table?

Look at the elements, list 3 that you would like to have in your house and why.

Can you think of or find a substance that is not made from any of the elements?

Do you think that we have discovered all of the elements in the universe? – If not, where do you think we may find some more? (See the link below for a news story that may help us to answer this question).

Link to newsround story about a comet.

8 thoughts on “What is an element?

  1. Everything in this world is made of elements. For example like water is made of oxygen and hydrogen which are elements. And salt which we eat everyday is made of elements sodium and chloride.

    Yes Abdi is right. There are 118 known elements in the world.

    I would like oxygen, gold and silver. Because oxygen helps us breath and gold and silver will make me rich.

    Dark matter is not an element because nobody knows what dark matter is made of. Space, could contain substance that may not be an element.

  2. A periodic table is a table , which shows different elements e.g hydrogen,neon and more.

    There are 118 elements in the periodic tables.A element is a substance that is made from a atom.Atoms are very small and made up of a fewer particles.

    There are three parts in a periodic the first part is metal the second part is semi metal and the third part is non metal

    There are two elements that are liquid, which is mercury and Bromine.hydregon is an explosive element.

    Steal is a alloy which is two elements mixed together . steel is made out of copper and iron .iron is a very strong element .

  3. An element is an atom there are over 100 of them.Atoms are tiny particles that are very small to see.There are over 100 different types and these are called elements.A example of an element is carbon Oxygen and Hydrogen.Here are some other types of elements.There are over 131 elements I think.These are the first 26

    Name: Symbol: Atomic weight:
    1.Hydrogen H 1.008
    2.Helium HE 4.003
    3.Lithium Li 6.939
    4.Beryllium Be 9.012
    5.Boron B 10.811
    6.Carbon C 12.011
    7.Nitrogen N 14.007
    8.Oxygen O 15.999
    9.FLUORINE F 18.998
    10.Neon Ne 20.183
    11.Sodium Na 22.990
    12.MAGNESIUM Mg 24.312
    13.ALUMINIUM Al 28.982
    14.silicon Si 28.086
    15.PHOSPHORUS p 30.974
    16.sulphur s 32.064
    17.chlorine cl 35.453
    18.argon ar 39.948
    19.potassium k 39.102
    20.calcium ca 40.08
    21.scandium sc 44.956
    22.titanium ti 47.90
    23.vanadium v 50.94
    24.chromium cr 52.00
    25.manganese mn 54.94
    26.iron fe 55.85

  4. An element is an atom there are over 100 of them.Atoms are tiny particles that are very small to see.There are over 100 different types and these are called elements.A example of an element is carbon Oxygen and Hydrogen.Here are some other types of elements.There are over 131 elements I think.

    Name: Symbol: Atomic weight:
    1.Hydrogen H 1.008
    2.Helium HE 4.003
    3.Lithium Li 6.939
    4.Beryllium Be 9.012
    5.Boron B 10.811
    6.Carbon C 12.011
    7.Nitrogen N 14.007
    8.Oxygen O 15.999
    9.FLUORINE F 18.998
    10.Neon Ne 20.183
    11.Sodium Na 22.990
    12.MAGNESIUM Mg 24.312
    13.ALUMINIUM Al 28.982
    14.silicon Si 28.086
    15.PHOSPHORUS p 30.974
    16.sulphur s 32.064
    17.chlorine cl 35.453
    18.argon ar 39.948
    19.potassium k 39.102
    20.calcium ca 40.08
    21.scandium sc 44.956
    22.titanium ti 47.90
    23.vanadium v 50.94
    24.chromium cr 52.00
    25.manganese mn 54.94
    26.iron fe 55.85

  5. What is an element?

    A element is a substance that cannot be broken down into simpler substances by chemical means.

    What is a periodic table?
    A periodic table is a table of the chemical elements arranged in order of atomic number, usually in rows, so that elements with similar atomic structure. It usually appears in vertical columns.

    How many elements are there on the periodic table?

    These different versions of hydrogen are called isotopes. All isotopes of a particular element have the same number of protons, but have a different number of neutrons. If you change the number of neutrons an atom has, you make an isotope of that element. Currently, scientists know of 118 different elements. Abdi is right! Well done Abdi!

    3 Elements that I need in my house.
    •I need H20 because every day I need to drink. I need to drink it consequently it makes me healthy.

    •I need electricity in my house because when it is dark, I need light to see. Also I need it to watch t.v and use the internet to do my homework.

    • I need gas in my house because I need to cook food. Furthermore I need it to warm up food.

    Something that is not a element
    Oxygen is not a element because it’s all around, oxygen is easy to dismiss as dull and inert; in fact, it’s the most reactive of the non-metallic elements.

    I think we can find them by asking a scientist to help us. Or we could type in something on the internet and it probably might come up.

    • Some good research Simran, but a couple of things need to be corrected:

      Oxygen is an element – look on a periodic table to find some more examples.
      Electricity is not an element as is made up of charge not a substance. In addition, H20 and most gases you use for cooking will be either a compound or a mixture rather than an element. Remember an element is the simplest substance you can get – An H20 molecule is made up of 2 hydrogen atoms and 1 Oxygen atom. Therefore, it is not an element because it can be broken down into simpler parts. However, oxygen cannot be broken down into a simpler substance – therefore it is an element. Does that make sense? Maybe you could do some research around what I have told you and share it with the class?

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