Halogens

Q. ​The diagram below shows the first three periods of the modern periodic table. Three elements have been represented by the letters X1, X2, and X3. ​

Arrange these elements in decreasing order of their valency.​

1. $X_3>X_2>{X_1}^{}$
2. $X_3>X_2>{X_1}^{}$
3. $X_1>{X_2}^{}>{X_3}^{}$
4. $X_1>X_3>{X_2}^{}$

Q. What is the chemical symbol of beryllium?

1. B
2. Be
3. Ba
4. Br

Q. An element 'P' has atomic number 56. What will be the formula of its halide?

1. PX
2. $P{X}_2$
3. $P{X}_3$
4. $P_2{X}_2$

Q.

Among halogens, __has the smallest atomic radius.

Q.

Element with highest electron affinity is

1. Cl

2. O

3. Na

4. F

Q.

Which of the following is the symbol for Bromine?

1. Br
2. S
3. Ca
4. Be

Q. There are ______ elements known to us at present in which ______are naturally occuring and ______have been prepared artificially.

1. 120, 88, 25
2. 115, 92, 23
3. 100, 22, 31
4. 111, 99, 11

Q.

Bromine on the periodic table is noted by which symbol?

1. Br

2. Ce

3. Be

4. S

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

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

Q.

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

1. Br

2. Si

3. Ga

4. I

Q.

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

Q.

The most non-metallic element in group 17 is:

1. F

2. Cl

3. Br

4. I

Q. Which of the following is a purple coloured solid halogen?

1. Chlorine
2. Bromine
3. Iodine
4. Astatine

Q.

Group 17 elements are -

1. Metals

2. Non-metals

3. Noble elements

4. Transition elements