Periodic Table of Elements

Based on the picture, give the atomic number and symbol of the element.

• Ag 47

• Au 79

• H 1

• O 8

The noble gases such as Helium, Xenon, Argon are part of which group?

How many principal energy levels are there in period 7?

• 8

• 20

• 5

• 7

It is where the elements in our daily living are found. It is a very useful tool in identifying the strengths and weaknesses of every element.

The picture shows the Sodium element from the Periodic Table of Elements. What do you think is its symbol?

• Ma

• S

• Na

• Sm

Johann Wolfgang Dobereiner developed the first Periodic Table of Elements. According to him, many properties of the middle element in each triad are approximate averages of the properties of the first and third elements. What is it called?

He is the Father of the Modern Periodic Table of Elements we see nowadays.

• Henry Gwyn Moseley

• Dmitri Ivanovich Mendeleev

• Johann Wolfgang Dobereiner

• John Alexander Reina Newlands

Which type of atomic model is this?

How many elements are there in the Periodic Table of Elements?

• 117

• 118

• 119

• 120

Reflect on the group study we conducted earlier. Limit your response to 3 sentences only.