2. Atoms & Elements

Based on the number of protons each element has, which would you expect to be chemically similar?

What is the significance of the periodic table of elements? Choose the best answer.

Which element is placed in the same period as ruthenium but has a higher atomic number than it?

The symbol for xenon (Xe) would be a part of the noble gas notation for the element.

What are 1A, 3B, and 7A examples of on the periodic table?

What is the atomic symbol for the element in group 4B (4) and the fourth period?

How is today's periodic table different from the one that Mendeleev published?

After Mendeleev organized the periodic table by atomic weight, he noticed a pattern of ....?

A russian chemist developed the periodic table as a way to group elements and atoms according to

Identify the chemical symbols for the elements carbon, aluminum, hydrogen, oxygen, and sodium.

What is the chemical symbol for the group 6a 16 element that lies in period 4?