He was able to work out the Atomic Mass of the missing elements, and so predict their properties. And when they were discovered, Mendeleev turned out to be right. For example, he predicted the properties of an undiscovered element that should fit below aluminium in his table. When this element, called gallium, was discovered in 1875, its properties were found to be close to Mendeleev's predictions. Two other predicted elements were later discovered, lending further credit to Mendeleev's table.
you only find 1 type of atom in an element
Non
Where do you find it? In every chemistry book out there. It's a very well organized chart that lists properties and characteristics of every element in the universe. Its arrangement also displays trends of different families of elements. The more you learn about it, the more it teaches you!
The number of protrons of whichever element you choose. Each element has an exact number of protrons.
how do you find an element's group
Each number in a matrix is called an element.
The atomic number of an element tells you how many protons there are in each nucleus of each atom of the element. On the periodic table, you find the atomic number at the top of the box for each element.
The atomic number of an element tells you how many protons there are in each nucleus of each atom of the element. On the periodic table, you find the atomic number at the top of the box for each element.
i need help
To determine the empirical formula from mass data, you need to find the molar mass of each element in the compound. Then, divide the given mass of each element by its molar mass to find the moles of each element. Finally, divide the moles of each element by the smallest number of moles to get the simplest whole number ratio of elements, which represents the empirical formula.
refer to a periodic able and find out which element your are looking for and see what period is it in (horizontally)
256Md has been used to find out some of the chemical properties of the element Mendelevium, while in an aqueous solution. There are no other uses of mendelevium and only trace amounts of the element have ever been produced.
Mendeleev arranged the elements in a table ordered by atomic mass, corresponding to relative molar mass as defined today.
you only find 1 type of atom in an element
Non
You would need to know the abundance of each isotope to find the average atomic mass of the element. The average atomic mass is calculated by multiplying the mass of each isotope by its relative abundance and then summing these values together.
Where do you find it? In every chemistry book out there. It's a very well organized chart that lists properties and characteristics of every element in the universe. Its arrangement also displays trends of different families of elements. The more you learn about it, the more it teaches you!