Halogens

Q.

How to calculate or figure out the hybridization state, i.e. sp³ or sp², etc?

Explain in detail with some examples.

Q.

Element with highest electron affinity is

1. Na

2. O

3. F

4. Cl

Q. The elements of one short period of the periodic table are given below in order from left to right: Li Be B C O F Ne
(a) To which period do these elements belong?
(b) One element of this period is missing. Which is the missing element and where should it be placed?
(c) Which one of the elements in this period shows the property of catenation?
(d) Place the three elements, fluorine, beryllium and nitrogen, in the order of increasing electronegativity.
(e) Which one of the above elements belong to the halogen series?

Q.

Among halogens, __has the smallest atomic radius.

Q.

What property do all elements in the same column of the periodic table as fluorine have in common?

Q.

The element with a controversial placement in the modern periodic table is __.

Q. Which of the following elements of the same group have
a. Largest atomic size
b. Highly reactive?
F, Cl, Br
​

Q.

What is the charge of group 4 elements?

Q. Fill in the blanks from the choices given below:
(i) Across a period, the ionisation potential __________ (increases, decreases, remains same).
(ii) Down the group, electron affinity _________ (increases, decreases, remains same).

Q.

Determine the empirical formula of a compound containing 47.9% potassium, 5.5% beryllium and 46.6% fluorine by mass. (Atomic weight of K = 39, Be = 9, F = 19). Work to one decimal place.

1. K₃BeF₉

2. K₄BeF₂

3. KBeF₄

4. KBeF₉

5. K₂BeF₄

Q.

The element of one short period of the Periodic Table are given below in order from left to right:
Li Be B C O F Ne
(i) To which period do these elements belong?
(ii) One element of this period is missing. Which is the missing element and where should it be placed?
(iii) Which one of the elements in this period shows the property of catenation?
(iv) Place the three elements fluorine, beryllium and nitrogen in the order of increasing electronegativity.
(v) Which one of the above elements belongs to the halogen series?

Q.

Elements in the halogen family belonging to 17th group in the periodic table show similarity in their properties

please define above question

Q. An element having electronic configuration 2, 8, 7 will belong to _____ and _____ of modern periodic table.

1. 3rd group, 7th period
2. 17th group, 2nd period
3. 7th group, 3rd period
4. 17th group, 3rd period

Q. For the main group of the periodic table, the metallic properties of the elements vary approximately with their position as shown in the table.

1	2	13	14	15	16	17	18
H							He
A				B
C				D

(i) Will the most metallic element be found at A, B, C or D?
(ii) Will the most non-metallic element be found at A, B, C or D?

Q. The chemical symbol of silicon is

1. Sc
2. Sl
3. Si
4. Sn

Q.

What is affinity?

Q.

What are the group two elements called?

Q. Electron affinity decides electronegativity and electropositivity.

1. True
2. False

Q.

The elements of one short period of the Periodic Table are given below in order from left to right :

Li Be B C O F Ne

(a) To which period do these elements belong ?

(b) One element of this period is missing. Which is the missing element and where should it be placed ?

(c) Place the three elements fluorine , beryllium and nitrogen in the order of increasing electronegativity.

(d) Which one of the above elements belongs to the halogen series ?

Q.

How is diamond prepared artificially?

Q.

The elements of Group 1 are known as...................

Q.

Which of the following symbols represents the atomic number of an element ?

1. $\mathrm{Z}$

2. $\mathrm{p}$

3. $\mathrm{e}$

4. $\mathrm{A}$

Q.

An element belongs to Group $17$ and the third period of the periodic table. Write the following:

Its valency.

Q.

The elements of group 16 are collectively termed as _______.

Q. Fluorine, chlorine and bromine are put in one group on the basis of their similar properties.​
(i) What are those similar properties?​
(ii) What is the common name of this group or family?​

Q. An element in the periodic table has the electronic configuration of 2, 8, 7. Which of the following family does the element belong to?

1. Alkali metals
2. Alkaline earth metals
3. Noble gas
4. Halogens

Q.

Give one word for the following:
Name the hardest substance known.

Q. The elements present in the ${17}^{th}$ group of the modern periodic table are otherwise known as:

1. Halogens
2. Pnicogens
3. Chalcogens
4. Alkali metals

Q.

Which element can be placed in the region marked by a question mark?

1. Ga

2. Br

3. Si

4. I

Q. 31. Electron affinity of Chlorine is greater than that of Fluorine. But electronegativity of Fluorine is greater than that of Chlorine. Why?