Yesterday i mentioned why it is important to understand the topic on Periodic Table well, in order to score well for GCE O Level Chemistry Examination. I have also posted 2 exam-based questions on Features & Trends in the Periodic Table.
In the next few days, i am gog to blogpost on?Periodic Table Mini Series by sharing Chemistry Tips & Strategies with discussions on exam-based questions.
For now, let us look into the
Features?of the Periodic Table:
- Elements in the Periodic Table are arranged in order of increasing proton number.
Period:
- 7 Horizontal Rows of elements, numbered 1 to 7
- Each element in a period has a proton number which is 1 < the element after it
- As we move from LEFT –> RIGHT of the Periodic Table
=> Metallic character of the elements ?
=> Non-metallic character ? - Elements in the same period contains same number of electron shells
Group:
- 8 Vertical columns of elements in the Periodic Table, numbered I to VIII (or 0)
- Elements in the same group
=> Same number of valence electrons
=> Similar chemical properties
Hope you are already learning something. Now is your time to participate in order to accelerate your learning.
Question 1:
Which statement about the Periodic Table is false?
a. Elements get more metallic on descending a group
b. Elements in the same group have the same number of valence electrons
c. From left to right across a period, there is a change from non-metallic to metallic
d. Elements are arranged in order of increasing proton number
Question 2:
In the Periodic Table, how many periods include the elements of atomic numbers 1-18?
a. 2
b. 3
c. 6
d. 8
PS: Try it out?and leave your suggested answers & explanations in the “LEAVE A REPLY” section right below this post.