Nuclei Test

Result

Nuclei Test - 40

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
1 / -0

Find out the product of a $$Co^{60}$$ atom that undergoes one beta plus decays?

A
iron-60

B
manganese-60

C
copper-60

D
copper-62

E
iron-62

Solution

$$\beta^+$$ decay: $$^{60}_{28}Co \rightarrow$$ $$^{A}_{Z}X$$ $$+$$ $$^0_{+1}e$$
In a nuclear reaction, the mass number as well as the atomic number is conserved.
$$\therefore$$ $$60 = 0 + A$$ $$\implies A =60$$
Also, $$27 = 1 + Z$$ $$\implies Z = 26$$
Thus, the product of the reaction is iron-60 i.e $$^{60}_{26}Fe$$.
Question 2
1 / -0

A chlorine atom whose nucleus contains $$17$$ protons and $$20$$neutrons. Find out the composition of the nucleus of an isotope of chlorine?

A
$$20$$ protons, $$17$$ neutrons

B
$$19$$ protons, $$18$$ neutrons

C
$$18$$ protons, $$18$$ neutrons

D
$$17$$ protons, $$19$$ neutrons

E
$$16$$ protons, $$20$$ neutrons

Solution

Isotope nucleus means that those nucleus has same protons number but different neutrons and mass number. Since chlorine has 17 protons so its isotope also will have 17 protons. Thus, option D will correct.
Question 3
1 / -0

Compared to the parent nucleus, the daughter nucleus of a $$\beta$$ decay has:

A
the same mass number but a smaller atomic number

B
the same mass number but a greater atomic number

C
a greater mass number but the same atomic number

D
a smaller mass number but the same atomic number

E
None of the above

Solution

When beta decay occurs, the atomic number of nucleus will increase by one unit and mass number will remain same. Thus, here the after beta decay the daughter nucleus has same mass number as product nuclei and one unit atomic number will increase than parent nuclei.
Question 4
1 / -0

Which of the following particles may differ in numbers in neutral isotopes of the same element?

A
protons

B
neutrons

C
electrons

D
alpha particles

E
positrons

Solution

Isotopes of the same element have same number of protons but different number of neutrons.
For example : $$^{35}_{17} Cl$$ and $$^{37}_{17} Cl$$ are isotopes of each other.
Both have $$17$$ protons but first $$Cl$$ has $$18$$ neutrons and other $$Cl$$ has $$20$$ neutrons.
Question 5
1 / -0

Six protons and six neutrons are brought together to form a carbon nucleus, but the mass of the carbon nucleus is less than the sum of the masses of the individual particles due to the mass defect, This deducted mass has been

A
converted into the binding energy of the nucleus.

B
given of in a radioactive decay process.

C
converted into electrons.

D
converted into energy to hold the electrons in orbit

E
emitted as light.

Solution

Nuclear binding energy accounts for a noticeable difference between the actual mass of an atom's nucleus and its expected mass based on the sum of the masses of its non-bound components. The release in energy accounts for the stability of the bound atom.
Quantitatively, mass defect=$$\Delta M=M_{protons}+M_{neutrons}-M_{atom}$$
Question 6
1 / -0

Which of the following sometimes requires initiation from a neutron?

A
nuclear fission

B
radiation therapy

C
radioactive tracer

D
radioactive carbon dating

Solution

The process of splitting a nucleus is called nuclear fission. Uranium or plutonium isotopes are normally used as the fuel in nuclear reactors, because their atoms have relatively large nuclei that are easy to split, especially when hit by neutrons.

When fission of an element takes place when hit by a neutron, further more neutrons are released. The additional neutrons released may also hit other uranium or plutonium nuclei and cause them to split. Even more neutrons are then released, which in turn can split more nuclei. This is called a chain reaction.
Question 7
1 / -0

When $$_{92}^{238}U$$ undergoes alpha decay, what is the daughter nucleus?

A
$$_{90}^{236}Th$$

B
$$_{91}^{236}Pa$$

C
$$_{90}^{234}Th$$

D
$$_{94}^{242}Pu$$

E
$$_{94}^{240}Pu$$

Solution

Let the daughter nucleus be $$^A_ZX$$.
Alpha decay of Uranium : $$^{238}_{92} $$ $$ \rightarrow$$ $$^{A}_ZX $$ $$+$$ $$^4_2 He$$

Conservation of mass number : $$238 = A+ 4$$ $$\implies A = 234$$
Conservation of atomic number : $$92 = Z+2$$ $$\implies Z =90$$
Thus the daughter nucleus is $$^{234}_{90} Th$$.
Question 8
1 / -0

On bombardment of neutron with boron, $$\alpha$$-particle is emitted. The product nuclei formed is:

A
$$_{6}C^{12}$$

B
$$_{8}Li^{6}$$

C
$$_{4}Be^{9}$$

D
$$_{3}Li^{7}$$

Solution

$$_{3}Li^{7}$$
$$^{10}B +n(0.025eV)\rightarrow_{4}He^{2}+_{7}Li^{3}+2.79MeV$$
Lithium is formed on the bombardedment of neutron with boron by emitting $$\alpha$$ particles.
Question 9
1 / -0

Which of the following isotopes is used for treatment of cancer?

A
$$Co^{60}$$

B
$$K^{40}$$

C
$$Sr^{90}$$

D
$$I^{131}$$

Solution

$$Co^{60}$$
Cobalt therapy or cobalt -60 therapy is the medical use of gamma rays from the radioisotope cobalt 60 to treat conditions such as cancer.
Question 10
1 / -0

What is the molar mass of ammonium carbonate $${({NH}_{4})}_{2}{CO}_{3}$$?

A
$$48\ g/mol$$

B
$$96\ g/mol$$

C
$$82\ g/mol$$

D
$$78\ g/mol$$

E
$$192\ g/mol$$

Solution

$$(NH_4)_2CO_3$$ is the chemical formula of ammonium carbonate.

$$N = 14 \times (2) = 28$$
$$H = 1 \times (4 \times 2) = 8 $$
$$C = 12 \times 1 = 12 $$
$$O = 16 \times 3 = 48 $$

Molar mass $$= 28 + 8 + 12 + 48 = 96\ g/mol$$

User

Question Analysis

Correct -
Wrong -
Skipped -

My Perfomance

Score
-
out of -
Rank
-
out of -

Re-Attempt Weekly Quiz Competition

Nuclei Test - 40

Result

Nuclei Test - 40

Score

-

Rank

-

SHARING IS CARING

Question 1

iron-60

manganese-60

copper-60

copper-62

iron-62

Solution

Question 2

$$20$$ protons, $$17$$ neutrons

$$19$$ protons, $$18$$ neutrons

$$18$$ protons, $$18$$ neutrons

$$17$$ protons, $$19$$ neutrons

$$16$$ protons, $$20$$ neutrons

Solution

Question 3

the same mass number but a smaller atomic number

the same mass number but a greater atomic number

a greater mass number but the same atomic number

a smaller mass number but the same atomic number

None of the above

Solution

Question 4

protons

neutrons

electrons

alpha particles

positrons

Solution

Question 5

converted into the binding energy of the nucleus.

given of in a radioactive decay process.

converted into electrons.

converted into energy to hold the electrons in orbit

emitted as light.

Solution

Question 6

nuclear fission

radiation therapy

radioactive tracer

radioactive carbon dating

Solution

Question 7

$$_{90}^{236}Th$$

$$_{91}^{236}Pa$$

$$_{90}^{234}Th$$

$$_{94}^{242}Pu$$

$$_{94}^{240}Pu$$

Solution

Question 8

$$_{6}C^{12}$$

$$_{8}Li^{6}$$

$$_{4}Be^{9}$$

$$_{3}Li^{7}$$

Solution

Question 9

$$Co^{60}$$

$$K^{40}$$

$$Sr^{90}$$

$$I^{131}$$

Solution

Question 10

$$48\ g/mol$$

$$96\ g/mol$$

$$82\ g/mol$$

$$78\ g/mol$$

$$192\ g/mol$$

Solution

User

Question Analysis

My Perfomance

Score

-