What four pieces of evidence does an element box tell you about an element?

What four pieces of evidence does an element box tell you about an element?

Each square on the periodic table gives at minimum the name of the element, its symbol, atomic number and relative atomic mass (atomic weight).

Why did Mendeleev leave gaps in periodic table?

Mendeleev left gaps in his table to place elements not known at the time. By looking at the chemical properties and physical properties of the elements next to a gap, he could also predict the properties of these undiscovered elements. The element germanium was discovered later.

How did Mendeleev predict missing elements?

Predictions using gaps Mendeleev left gaps in his table to place elements not known at the time. By looking at the chemical properties and physical properties of the elements next to a gap, he could also predict the properties of these undiscovered elements.

How many elements did Mendeleev discover?

70 elements

Why was Mendeleev’s periodic table useful?

In 1869, Dmitri Mendeleev developed a method for organizing elements based on their atomic mass. Mendeleev’s periodic table was a good model because it could be used to predict unknown elements and their properties. All of these missing elements were eventually discovered.

What made Mendeleev’s periodic table particularly special?

Features of Mendeleev’s tables Mendeleev arranged the elements in order of increasing relative atomic mass . When he did this he noted that the chemical properties of the elements and their compounds showed a periodic trend .

What did Mendeleev leave in his table?

Mendeleev’s periodic table is an arrangement of the elements that group similar elements together. He left blank spaces for the undiscovered elements (atomic masses, element: 44, scandium; 68, gallium; 72, germanium; & 100, technetium) so that certain elements can be grouped together.

What is the difference between the modern periodic table and Mendeleev?

The main difference between Mendeleev and Modern Periodic Table is that Mendeleev’s periodic table orders the elements based on their atomic mass whereas Modern periodic table orders the elements based on their atomic number.

What group is missing from Mendeleev’s periodic table?

Noble Gases

What is the main difference between Mendeleev and Moseley’s periodic table?

The difference between Mendeleev and Moseley periodic table is that Mendeleev periodic table is created based on the atomic masses of chemical elements whereas Moseley periodic table is created based on the atomic numbers of chemical elements.