Periodic Table TEST - 2025

These metals make up the Lanthanide series and the Actinide series

• outer transition metals
• inner transition metals
• halogens

What is Carbon's Period & Group Number?

• 1,18
• 2,14
• 2,6
• 5, 1

How many valence electrons does Helium have?

• 10
• 8
• 2
• 4

The electrons in the outermost shell (main energy level) of an atom; these are the electrons involved in forming bonds - What are they called?

• alkali metals (group 1)
• Halogens (Group 17)
• valence electrons
• atomic number

Alkali metals belong to a group of elements whose atoms have only one electron in their outer energy level. According to this definition, which of these is an atom of an alkali metal? (Select the best option (1).)

• 
• 
• 

Which category contains the most elements on the periodic table?

• semimetals
• nonmetals
• transition metals
• alkali earth metals

The three main groups of elements are metals, nonmetals, and______________

• transition metals
• halogens
• metalloids
• gases

The order of elements in the modern periodic table is based on an element’s

• decreasing atomic mass
• increasing atomic mass
• increasing atomic number
• decreasing atomic number

All the elements in this series are Radioactive

• Transition Metals
• Halogens
• Actinide Series

The elements in this group do not naturally combine with other elements.

• Noble Gases
• Halogens
• Alkali Metals