Isotopes

Q. How many protons, neutrons and electrons are present in a carbon-12 atom?

1. 6 electrons, 6 protons, 6 neutrons
2. 6 electrons, 12 protons, 6 neutrons
3. 6 electrons, 6 protons, 12 neutrons
4. 6 electrons, 12 protons, 12 neutrons

Q.

Do isobars have also identical chemical characteristics like isotopes ?

Q. The number of neutrons present in deuterium is .

1. two
2. three
3. one
4. zero

Q. Atoms of the same element with different mass numbers are known as

1. Isobars
2. Isomers
3. Isotopes
4. Isotones

Q. The radioactive isotope of carbon used for carbon dating is

1. C-12
   
2. C-14
3. Diamond
4. None

Q.

Name the main commercial source of Helium?

Q.

Number of isotopes of Carbon is____________.

Q.

What are the two isotopic forms of boron?

Q.

How are the isotopes of hydrogen represented?

Q.

If an isotope of ‘H’ has a mass number =3, how many neutrons does it have?

Q. The atomic mass of carbon is:

1. 6 u
2. 12 u
3. 24 u
4. 32 u

Q.

Isotopes find important applications in a variety of areas in the fields of medicine, agriculture, generation of cheaper electricity, industry, radiocarbon dating, etc.

1. Which isotope is used for detecting thyroid disorder?
2. Which isotope is used to monitor the uptake of phosphorus by plants?
3. Which isotopes are used for the generation of cheaper electricity?
4. Which isotope is used to test the complete removal of phosphorus from steel in the manufacture of steel?
5. Which isotope is used for finding the age of a fossil?

Q. Isotopes of the same element do not have the same number of

1. protons
2. neutrons
3. electrons

Q. How many valence electrons does an ion with $15$ protons have?

Q. Isotopes of an element have different number of neutrons.

1. neutrons

2. protons

Q. What is isotopes and isobars?

Q. Write the three isotopes of oxygen.

Q. <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> What is isotopes and isobars?

Q. Assume a certain element Y contains one more proton and two more neutrons than protium. Then the mass number of element Y will be

1. 3
2. 2
3. 4
4. 5

Q.

In a sample of ethyl ethanoate $\left({\mathrm{CH}}_3{\mathrm{COOC}}_2{\mathrm{H}}_5\right)$ the two oxygen atoms have the same number of electrons but different number of neutrons. Which of the following is the correct reason for it?

1. One of the oxygen atoms has gained electrons.

2. One of the oxygen atoms has gained two neutrons.

3. The two oxygen atoms are isotopes.

4. The two oxygen atoms are isobars.

Q. How many number of neutrons are there in tritium?

1. Two
2. Three
3. Four
4. One

Q.

Name four noble gases along with their symbols.

Q. The number of neutrons present in carbon-14 are _______.

1. 14
2. 8
3. 6
4. 12

Q. Isotopes are atoms with the same number of protons , but differing numbers of neutrons . Isotopes are different forms of a single element.

1. True
2. False

Q.

Which of the following are isotopes?

1. $H_1^1$, $H_1^2$, $H_1^3$

2. $C{a}_{20}^{40}$, $A{r}_{18}^{40}$

3. $C_6^{12}$, $C_6^{13}$, $C_6^{14}$

4. $O_8^{15}$, $O_8^{16}$, $O_8^{17}$

Q. Physical properties of isotopes are different.

1. True
2. False

Q. The teacher asked Sushma that in ethyl ethanoate $\left(C{H}_{3}COO{C}_2{H}_5\right)$ the two oxygen atoms have the same number of electrons but different number of neutrons. Which of the following is the correct reason for it?

1. The oxygen atoms are isotopes

2. One of the oxygen atom has gained electrons

3. The two oxygen atoms are isobars

4. One of the oxygen atoms has gained two neutrons

Q.

Is there any similarity in Isotopes and allotropes?

Q. Atoms of the same element with different mass numbers are called .

1. isotopes
2. isomers
3. isobars

Q. Which of the following ion is not isoelectronic with $O^{2-}$?

1. $N^{3-}$
2. $N{a}^{+}$
3. $T{i}^{+}$
4. $F^{-}$