2. Atoms & Elements

How does the periodic table organize elements with similar chemical properties?

How are elements in the periodic table primarily arranged?

Who is credited with creating the first periodic table?

Approximately how many naturally occurring elements are there on Earth?

Is the current representation of the periodic table of elements considered perfect?

Which classification best describes the element calcium (Ca) in the fourth period of the periodic table?

Which of the following elements is likely to be the most brittle?

Who arranged the periodic table in order of increasing atomic number?

What do the elements lithium (Li), sodium (Na), potassium (K), and rubidium (Rb) have in common?

In which block of the periodic table is uranium (U) found?

How are elements arranged on the modern periodic table?

Which of the following elements is classified as a metalloid?

Which property do metalloids share with nonmetals?

Which of the following elements is classified as a metal?

Which statement best describes the location of metalloids on the periodic table?