Took me a while to find but you can spot it eventually.
It's Argon (Ar) and Potassium (K).
Hope this helps :)
The periodic law states that when the elements are arranged by increasing atomic number, there will be periodic repetition.
Mendeleev arranged the elements in a table in the increasing order of atomic masses and repeating periodic properties. In the modern long-form of periodic table, the elements are arranged in the increasing order of atomic number and repeating periodic properties.
No. The elements are arranged in order of increasing atomic number.
In Mendeleev's periodic table the elements are arranged in increasing atomic mass and repeating properties whereas in in the modern periodic table the elements are arranged in increasing atomic number and repeating properties.
Now modern periodic table is arranged in order of increasing atomic number. The properties are found to be periodic when arranged in this pattern.
The periodic law states that when the elements are arranged by increasing atomic number, there will be periodic repetition.
In modern periodic table, elements are listed by increasing atomic number.
He arranged the elements in the increasing order of their atomic masses and repeating periodic properties.
Mendeleev arranged the elements by increasing atomic mass instead of like today by increasing atomic number.
Mendeleev arranged the elements in a table in the increasing order of atomic masses and repeating periodic properties. In the modern long-form of periodic table, the elements are arranged in the increasing order of atomic number and repeating periodic properties.
No. The elements are arranged in order of increasing atomic number.
In the first Periodic Table by Mendeleev, he arranged the elements in the increasing order of their atomic masses and repeating properties.
In Mendeleev's periodic table the elements are arranged in increasing atomic mass and repeating properties whereas in in the modern periodic table the elements are arranged in increasing atomic number and repeating properties.
The elements are arranged in the increasing order of their atomic number and repeating properties.
Now modern periodic table is arranged in order of increasing atomic number. The properties are found to be periodic when arranged in this pattern.
The elements on the periodic table are arranged in order of increasing atomic number.
Increasing atomic number.