Question

Circle the letter of each type of information Mendeleev knew about each element.

a) name
b) number of protons
c) relative mass
d) properties

Answer 1

Mendeleev knew the name, number of protons, relative mass, and properties of each element when organizing them in the periodic table.

Step-by-step explanation:

Mendeleev knew several types of information about each element when organizing them in the periodic table:

1. Name: Mendeleev knew the names of each element, which allowed him to label them correctly in the periodic table.
2. Number of Protons: He knew the number of protons in each element, which determines an element's atomic number and its position in the periodic table.
3. Relative Mass: Mendeleev had information about the relative mass of each element, which helped him determine the order of elements in the periodic table based on increasing atomic mass.
4. Properties: Lastly, Mendeleev knew the properties of each element, such as boiling point, density, and reactivity. These properties helped him identify similarities and patterns among elements in the periodic table.