Groups and Periods

Q.

What are the demerits of the modern periodic table?

Q.

What is the second ionization energy of sodium?

Q.

What is successive ionization energy?

Q.

How many ionization energies can carbon theoretically have?

Q.

Explain the formation of calcium oxide with the help of an orbit diagram.

Q. Which of the following pairs have dissimilar chemical properties?

1. Sodium ($\text{Na}$) and potassium ($\text{K}$)
2. Barium ($\text{Ba}$) and strontium ($\text{Sr}$)
3. Zirconium ($\text{Zr}$) and hafnium ($\text{Hf}$)
4. Calcium ($\text{Ca}$) and copper($\text{Cu}$)

Q. Electron gain enthalpy for metals will be always negative.

1. False
2. True

Q.

In the modern periodic table, calcium (atomic number $20$) is surrounded by elements with atomic numbers$12,19,21,38$. Which of these have physical and chemical properties resembling calcium?

Q.

How Does Ionization Energy Increase?

Q. The energy required to remove the valence electrons of an isolated gaseous atom is called ionization energy.

1. True
2. False

Q. Position of an unknown element $3216E$ in the Modern periodic table is

1. Period = 2
   Group = 3
2. Period = 3
   Group = 16
3. Period = 2
   Group = 16
4. Period = 16
   Group = 3

Q. Element X, which is solid and has a high melting point, forms a chloride $XC{l}_3$.
This element X would be in a group of the modern periodic table along with

1. Na
2. Mg
3. Al
4. Si

Q. Valence shell electrons in an element are the most loosely bound electrons.

1. False
2. True

Q. The number of groups in the modern periodic table is:

1. 7
2. 8
3. 16
4. 18

Q. All of the following periodic properties decrease across a period of the Modern periodic table, except

1. Metallic character
2. Atomic radii
3. Basic nature of oxides
4. Number of shells

Q. Element $‘X^{\prime }$ : It is the most electropositive element
of the Modern Periodic Table.

Element $‘Y^{\prime }$ : It is the most electronegative element of the Modern Periodic Table.

Elements $‘X^{\prime }\text{and}‘Y^{\prime }$ respectively are

1. $Cs\text{and}F$
2. $Br\text{and}Li$
3. $Br\text{and}Cs$
4. $F\text{and}Ca$

Q. The second ionization energy is always the first ionization energy.

1. greater than
2. lesser than
3. equal to

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. The second electron gain enthalpy for oxygen is .

1. positive
2. negative
3. zero

Q. <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> In the modern periodic table, sodium (atomic number: 11) is surrounded by elements with atomic numbers 3, 12, and 19 respectively. Which of these elements have physical and chemical properties resembling sodium?

Q. An element X belongs to group fourteen and second period of the periodic table. Its atomic number is:

1. six
2. seven
3. eleven
4. fifteen

Q. Element 'X' reacts with chlorine to form a chloride compound of formula ${\text{XCl}}_4$. 'X' would most likely belong to the same group in the periodic table as that of:

1. Silicon
2. Magnesium
3. Aluminium
4. Sodium

Q.

Does oxygen have high ionization energy?

Q. There are groups and periods in the modern periodic table.

1. 18
2. 7
3. 6
4. 8

Q. The element that doesn't belong to the same group as that of potassium is

1. Li
2. Na
3. Cs
4. Mg

Q. Which of the following element have the same chemical properties as an element having electronic configuration 2, 8, 5?

1. Fluorine (9)
2. Sodium (11)
3. Nitrogen (7)
4. Argon (18)

Q. Valence shell electrons in an element are the most loosely bound electrons.

1. True
2. False

Q.

In the modern periodic table the elements Be, Mg, Ca, Sr, Ba and Ra belong to the group

1. 8

2. 12

3. 15

4. 2

Q. Which of the following element have the same chemical properties as an element having electronic configuration 2, 8, 5?

1. Fluorine (9)
2. Sodium (11)
3. Nitrogen (7)
4. Argon (18)

Q.

An element X is in the $1^{st}$ group of the modern periodic table. Its ion will be represented as:

1. $X^{+}$
2. $X^{2+}$
3. $X^{-}$
4. $X^{2-}$