Noble Gases

Q. What is the electronic configuration of Xenon as(KLMN) shell?

Q. Xenon is a inert gas. So why it react with fluorine and oxygen .

Q.

The electronic configuration of an element X is 2, 8, 6. What is the group and period number of element X in the periodic table?

Q.

Define pure elements.

Q.

An element has an atomic number 16. State the period to which it belongs.

1. Period 6

2. Period 4

3. Period 3

4. Period 5

Q.

The electronic configuration of an element is 2, 8, 3. To which group and period does the element belong?

Q.

In the table below some of the element of the periodic table with atomic numbers from 3 to 18 are given. These are represented by letters which are not the usual symbols of the elements.
(A) Which of these:
(i) is a noble gas.
(ii) is a halogen.
(iii) is an alkali metal.
(iv) is an element with valency 4.
(B) If A combines with F then what would be the formula of the resulting compound?
(C) What is the electronic arrangement of G?

$$\begin{array}{cccccccc}3& 4& 5& 6& 7& 8& 9& 10\\ A& & & & & E& & G\\ 11& 12& 13& 14& 15& 16& 17& 18\\ B& C& & D& & & F& \end{array}$$

Q. What do you mean by stability of an atom

Q. Oil and fat containing food items are flushed with nitrogen. Why?

Q. Question 3 (c)
Name three elements with filled outermost shells.

Q.

The valency of an alkali metal is .

Q.

According to the modern periodic table, the number of electrons in the valence shell of an atom represents its _______in the periodic table.

Q.

The electrons present in the valence shell of a noble gas atom can be:

(a) 8 Only

(b) 2 Only

(c) 8 or 2

(d) 8 or 4

Q.

Noble gases are also known as _____________ gases.

Q.

An element having electronic configuration 2, 8, 18, 3 belongs to which group of the Modern Periodic Table?

1. 3^rd group

2. 13^th group

3. 15^th group

4. 18^th group

Q.

Inert gases have zero valency. Give reason.

Q.

Where would you find the element with atomic number 18 in the periodic table?

Q.

Why does inert gases placed in zero group ?

Q.

(a) What ar noble gases? What are the characteristics of the electronic configuration of noble gases?
(b) What is the cause of chemical bonding (or chemical combination ) of an atom of an element?

Q.

What do you understand by the term valency?

Q.

An element 'Z' has the electronic configuration 2, 8. Name the element 'Z' and determine its atomic number.

1. Argon, 10

2. Helium, 10

3. Neon, 10

4. Neon, 8

Q.

The element 'M' has an atomic number 11.

(a) What is it's electronic configuration?
(b) Which group does 'M' belong to?
(c) Is 'M' a metal or a non-metal?
(d) Write the formula of its chloride.

Q.

What is the name of smallest atom?

Q.

The noble gas having only two electons in its valence shell is:
(a) Ar (b) Ne (c) He (d) Kr

Q. Write a brief note on the atomic structure of carbon.

Q.

Which one of the following doesn’t come under zero group?

1. He

2. K

3. Ne

4. Ar

Q. Which of the following statement is incorrect regarding the given elements?

1. BB is a noble gas
2. CC is an alkali metal
3. AA is the most electronegative element
4. DD has 5 electrons in its outermost shell

Q.

Elements with valency 1 are

1. always metal

2. always metalloids

3. either metal or non-metal

4. always non-metal

Q. is a noble gas among the following.

1. Hydrogen
2. Boron
3. Helium
4. Calcium

Q.

Why are there gaps between hydrogen and helium and why can't they keep square blocks correctly?