Finding Valence Electrons on the Periodic Table

This video tutorial explains how to find valence electrons using the periodic table. It covers the concept of valence electrons, the octet rule, and how elements in different groups have varying numbers of valence electrons. The video provides examples with hydrogen, lithium, helium, and beryllium, illustrating how to determine their valence electrons based on their group number.

What are valence electrons?

• Neutrons in the nucleus

• Electrons in the innermost shell

• Electrons in the outermost shell

• Protons in the nucleus

Tags

NGSS.MS-PS1-1

Which rule do valence electrons follow?

• Duet rule

• Octet rule

• Triple rule

• Quadruple rule

How many valence electrons do elements in group 1 have?

• Three

• Two

• One

• Four

Which of the following elements has one valence electron?

• Lithium

• Calcium

• Beryllium

• Magnesium

How many valence electrons do elements in group 2 have?

• One

• Four

• Two

• Three

How many valence electrons do elements in group 14 have?

• Two

• Three

• Four

• Five

Which group has elements with seven valence electrons?

• Group 18

• Group 16

• Group 17

• Group 15

Why is helium an exception to the octet rule?

• It has only one valence electron

• It has three valence electrons

• It has four valence electrons

• It has two valence electrons and is complete

How many valence electrons does helium have?

• Four

• One

• Three

• Two

How many valence electrons does beryllium have?

• Three

• Two

• One

• Four