Isotopes, Isotones and Isobars

Q. why chemical properties of isotopes are same and physical properties are different?

Q.

Isobars have same.............. number but different ............... number.

1. neutron, proton

2. electron, proton

3. atomic, mass

4. mass, atomic

Q.

Comment on the physical and chemical properties of isotopes of an element.

Q. Explain isotope and isobar with examples and related questions

Q.

Isotopes of an element are chemically similar.

1. True
2. False

Q.

The number of neutrons in Sodium and Magnesium nuclides are same and hence we call them as ______________

1. Isocore

2. Isobar

3. Isotope

4. Isotone

Q. What is the mass (in grams) of 3 moles of N atoms?

Q.

Which of the following is/are the properties of isotopes?

1. They have similar Chemical Properties.

2. They have the same density.

3. They have the different boiling point.

4. They are radioactive.

Q. Find the number of atoms in 62 g of phosphorous if its gram atomic mass is 31 g.

1. $2.00\times {10}^{23}$
2. $3.01\times {10}^{23}$
3. $1.204\times {10}^{24}$
4. $1.50\times {10}^{21}$

Q.

${}_1{}^2\mathrm{H}\mathrm{and}{}_1{}^3\mathrm{H}$ are ________.

Q.

Isotopes of an element have?

1. The same physical properties

2. Different chemical properties

3. Different numbers of neutrons

4. Different atomic numbers.

Q. Statement I: Physical properties of isotopes of an element are similar.
Statement II: Isotopes have the same number of nucleons.
Statement III: Chemical properties of C-12 and C-14 will be similar.

Which of the given statements is/are correct?

1. 
   Only I
   
2. 
   II and III
   
3. 
   I and II
   
4. 
   Only III
   

Q. Number of moles of any chemical substance is given by the ratio of to .

1. given mass
2. molar mass
3. Avogadro's number
4. atomic mass

Q.

Which of the following are isotones with each other?

1. ${}_{14}^{30}Si$

2. ${}_{15}^{31}P$

3. ${}_{16}^{32}S$

4. ${}_{17}^{35}Cl$

Q. Question 6(c)
Calculate the molar mass of the following substances:
(c) Phosphorus molecule, $P_4$ (atomic mass of phosphorus = 31)

Q.

Isotopes are?

1. Atoms of an element with similar chemical properties but different atomic masses.

2. Atoms of different elements with similar chemical properties but different atomic masses.

3. Atoms of an element with different chemical properties but the same atomic masses.

4. Atoms of different elements with different chemical properties but same atomic masses.

Q.

Why do isotopes have different physical properties?

1. Isotopes of an element have different electronic configuration

2. Isotopes of an element have different atomic number

3. Isotopes have same atomic number.

4. Isotopes of an element have different mass number.

Q.

Identify the isotopes out of A , B , C and D ?

${}_{17}{}^{33}\mathrm{A}$, ${}_{20}{}^{40}\mathrm{B}$, ${}_{17}{}^{37}\mathrm{C}$, ${}_{19}{}^{38}\mathrm{D}$.

Q.

Give one similarity and one dissimilarity between a pair of isotopes.

Q. Question 16
Isotopes of an element have:

(a) the same physical properties
(b) different chemical properties
(c) different number of neutrons
(d) different atomic numbers

Q. Observe the following table:
$\begin{array}{ccccc}\text{Name of the element}& \text{Symbol}& \text{Number of protons}& \text{Number of neutrons}& \text{Number of electrons}\\ \text{Oxygen}& O& 8& 8& 8\\ \text{Sulphur}& S& 16& 16& 16\end{array}$
With the help of table, find out the mass number of oxygen and sulphur atom.

Q. ^{​​​​​​M^2+ contains 10 electrons and 10 neutrons
(i) What is atomic number and mass number of the element M
(ii) Is it possible in an atom to have 13 protons and 13 neutrons .
(iii) Why helium gas is inert}

Q. Observe the following table:
$\begin{array}{ccccc}\text{Name of the element}& \text{Symbol}& \text{Number of protons}& \text{Number of neutrons}& \text{Number of electrons}\\ \text{Oxygen}& O& 8& 8& 8\\ \text{Sulphur}& S& 16& 16& 16\end{array}$
With the help of table, find out the mass number of oxygen and sulphur atom.

Q. Respected BYJUS faculty,

Q. Which of the following are pairs of isotones?

1. ${}^{37}Cl$ and ${}^{39}K$
2. ${}^{15}N$ and ${}^{16}O$
3. ${}^{14}C$ and ${}^{12}C$
4. Both A and B

Q.

Calculate the formula unit mass of $H_2{SO}_4$

1. 98

2. 100

3. 58

4. 20

Q. Find the number of atoms in 62 g of phosphorous if its gram atomic mass is 31 g.

1. $2.00\times {10}^{23}$
2. $3.01\times {10}^{23}$
3. $1.204\times {10}^{24}$
4. $1.50\times {10}^{21}$

Q. Which of the following are isobars?

1. Ce, Se
2. Fe, Se
3. Ce, Ni
4. Fe, Ce

Q. How many moles of ammonia weigh 85 g?

A) 5 moles
B) 10 moles
C) 15 moles
D) 20 moles

[1 Mark]

Q. Which one of them is a radioisotope?

1. Cobalt-60
2. Carbon-12
3. None of the above
4. Carbon-14