2. Atoms & Elements

Which of the following elements is classified as a metalloid?

Which group of elements belongs to the f-block of the periodic table?

In the periodic table, elements organized by columns share which of the following characteristics?

Who is credited with creating the first widely recognized periodic table of elements?

Where are noble metals typically located on the periodic table?

Which of the following pure substances can be classified as an element?

Which of the following elements is classified as a metalloid?

How is the modern periodic table of elements primarily arranged?

How many elements are currently recognized on the modern periodic table?

Which chart organizes the chemical elements based on their atomic number and chemical properties?

How did Dmitri Mendeleev develop the first periodic table of the elements?

Where are the metalloids located on the periodic table?

Which of the following particles is found in the nucleus of an atom?

In the periodic table, what are the rows called?

Why did the early versions of the periodic table not follow a consistent pattern?