Exploring the Periodic Table of Elements

This video tutorial by Mrs. H covers the periodic table, its history, and its organization. It explains the arrangement of elements based on atomic number and properties, highlighting the differences between metals, non-metals, and metalloids. The tutorial also discusses valence electrons, energy levels, and the formation of ions, providing a foundation for understanding periodic trends. While some advanced topics are introduced, they are not required knowledge for this lesson.

Which of the following is NOT a type of element found on the periodic table?

• Metals

• Non-metals

• Metalloids

• Ions

Who first observed that the properties of elements repeated every eighth element?

• Dmitri Mendeleev

• John Newland

• Henry Moseley

• Antoine Lavoisier

What did Dmitri Mendeleev use to organize his periodic table?

• Ionization energy

• Atomic weight

• Electronegativity

• Atomic number

In the modern periodic table, elements are primarily arranged by:

• Atomic weight

• Electronegativity

• Atomic number

• Melting point

Which group of elements is found on the far right side of the periodic table?

• Metals

• Transition metals

• Non-metals

• Metalloids

What is a valence electron?

• An electron that has been gained

• An electron in the innermost energy level

• An electron in the outermost energy level

• An electron that has been lost

Which of the following is a property of metals?

• Dull appearance

• Poor conductor of electricity

• Brittle when solid

• Good conductor of heat

How many valence electrons do elements in Group 1 have?

• 4

• 3

• 2

• 1

What happens to an atom when it forms a cation?

• It loses electrons

• It loses protons

• It gains electrons

• It gains protons

Which trend can be predicted using the periodic table?

• Color

• Atomic radius

• Density

• Boiling point