Sorry that I haven’t written you for so long but I was busy all this time.
I have a great news! My parents allowed me to go to Italy for two weeks! It was a great time. Let me tell you how I spent that amazing journey.
My sister and I stayed in a nice hotel in the centre of Rome. The room was convenient and there was a great view from the windows. Every day we enjoyed tasty cuisine, had fun at discos and swam in the large pool. During ten days we visited a lot of wonderful places such as Colosseum, Pantheon, Triton Fountain. You can’t even imagine how many photos I took! We really appreciated being there because of all the amazing sights and experiences we had.
I could write more but I really need to go. Hope we will meet soon.
1. Dmitri Mendeleev developed the concept of the periodic repetition of properties. 2. There are 8 columns in the periodic table. In each column, elements are arranged by the same properties, such as the same orbital arrangement of electrons. 3. Mendeleev predicted properties of yet undiscovered (missing) elements and left empty spaces for them in the table. 4. There are natural groupings between the elements that are closely related to each other. 5. In order to understand better these natural groupings, chemists have tried to fit the elements into a single plan. 6. John Ncwlands made one of the first attempts to fit the relationships among the elements by suggesting the Law of Octaves.
Sorry that I haven’t written you for so long but I was busy all this time.
I have a great news! My parents allowed me to go to Italy for two weeks! It was a great time. Let me tell you how I spent that amazing journey.
My sister and I stayed in a nice hotel in the centre of Rome. The room was convenient and there was a great view from the windows. Every day we enjoyed tasty cuisine, had fun at discos and swam in the large pool. During ten days we visited a lot of wonderful places such as Colosseum, Pantheon, Triton Fountain. You can’t even imagine how many photos I took! We really appreciated being there because of all the amazing sights and experiences we had.
I could write more but I really need to go. Hope we will meet soon.
Lots of love,
Потом напишешь кому и от кого.
2. There are 8 columns in the periodic table. In each column, elements are arranged by the same properties, such as the same orbital arrangement of electrons.
3. Mendeleev predicted properties of yet undiscovered (missing) elements and left empty spaces for them in the table.
4. There are natural groupings between the elements that are closely related to each other.
5. In order to understand better these natural groupings, chemists have tried to fit the elements into a single plan.
6. John Ncwlands made one of the first attempts to fit the relationships among the elements by suggesting the Law of Octaves.