2. Atoms & Elements

Which pair of elements together make up approximately seven percent of the Earth's crust?

Who is credited with developing the modern periodic table?

Which term is used to describe the horizontal rows that run from left to right on the periodic table?

How does the periodic table organize elements?

Which property is primarily used to organize elements in the modern periodic table?

Which of the following statements best describes how the periodic table is organized?

Which of the following best describes how the periodic table of the elements is organized?

How are elements arranged on the modern periodic table?

Which of the following lists the scientists in the correct chronological order based on their contributions to the development of the modern periodic table?

Which property did Dmitri Mendeleev use to organize the elements in his original periodic table?

Elements from period 3 of the periodic table are highlighted. Which element is classified as a metalloid?

Which of the following best describes metalloids and their location on the periodic table?

How did Dmitri Mendeleev organize the elements in his original periodic table?

Which of the following elements is classified as a metalloid?

Which of the following is a characteristic of metalloids?