Science 8: Chapter 4 → Section 2 Review

2A) What information is listed in an element's square in the periodic table?

Atomic Number, Chemical Symbol, Element Name, and Atomic Mass

2B) Describe two differences between Mendeleev's periodic table and the modern periodic table.

In the modern periodic table, the elements are arranged in order of increasing atomic number. In Mendeleev's table, they were arranged in order of increasing atomic mass. Another difference is that there are more elements in the modern periodic table due to the discoveries of new elements.

1A) In what order did Mendeleev arrange the elements in his periodic table?

Mendeleev arranged the elements known at the time in order of relative atomic mass.

2C) What elements has 47 protons in its nucleus?

Silver

1C) What elements did Mendeleev group with lithium in his periodic table?

Sodium and Potassium

1B) What pattern did Mendeleev discover when he arranged the elements?

When Mendeleev arranged the elements in order of increasing atomic mass, the properties where repeated. Because the properties repeated themselves regularly, or periodically, on his chart, the system became known as the periodic table of elements.