. periodic table * sub-shell
Diagrammatic questions
What factors do the valencies of elements depend upon?
A part of a periodic table is given below. Study it and answer the follow
ii. Sketch the atomic structure of that element which is placed in period 3
vi. transition element
IIA
IVA
IIIA
IA
VA
Be B. С N
Li
O
Periods 2
Mg
Si
Al
3. Na
Р S СІ
i Write the names of two very reactive non-metals.
questions.
VIA VIIA
O
Ne
F
Ar
has valency 4.
ii. Name the most reactive metal with a suitable reason.
study the given electronic configuration of the elements and answer the follo
questions.
A. 2,8,1 B.2,8 C. 2,8,7 D. 1

Label a-f based on the table using c for concentrated and d for dilute

In which reaction is precipitation occurring?

Astudent made the lewis dot diagram of a compound as shown. mg is written with two dots shown on its top. an o is written on each side of mg. each o has six dots around it. an arrow is shown from one dot on mg toward the vacant space around the o on the right. another arrow is shown from the other dot on mg toward the vacant space around the o on the left. the title of the art is students lewis dot model. what is the error in the lewis dot diagram? an o atom should transfer all its six electrons to mg because the formula is mgo. both electrons of mg should be transferred to one o atom because the formula is mgo. the electrons should be transferred from each o atom to mg because mg has fewer electrons. the number of dots around mg should be four because it has to transfer two electrons to each o.