CameraIcon

SearchIcon

MyQuestionIcon

1

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Atomic Number

Identify whic...

Question

Identify which of the following element has a mass number of 20 and contains 11 neutrons?

A

Copper

No worries! We‘ve got your back. Try BYJU‘S free classes today!

B

Gallium

No worries! We‘ve got your back. Try BYJU‘S free classes today!

C

Calcium

No worries! We‘ve got your back. Try BYJU‘S free classes today!

D

Sodium

No worries! We‘ve got your back. Try BYJU‘S free classes today!

E

Fluorine

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

Open in App

Solution

The correct option is D Fluorine
Mass number of element, $A = 20$
Number of neutrons, $N_{n} = 11$
$∴$ Number of protons, $N_{p} = A - N_{n} = 20 - 11 = 9$
$⟹$ Atomic number, $Z = N_{p} = 9$
The element must be fluorine i.e $_{9}^{20} F$

Suggest Corrections

thumbs-up

0

Similar questions

Q. Which element has a mass number of 20 and contains 11 neutrons?

Q. Any chemical element (X) can be represented as

_{Z} X^{A}

where ‘Z’ is an atomic number and ‘A’ is the mass number. For an element, calcium which has 20 protons and 20 neutrons, identify the correct representation.

Q. If an element X has mass number and number of proton 8 then identify element X

Q. Any chemical element (X) can be represented as

_{Z} X^{A}

where ‘Z’ is the atomic number and ‘A’ is the mass number. The Atomic number refers to the number of protons and the mass number refers to the sum of protons and neutrons in an atom. For an element, calcium which has 20 protons and 20 neutrons, identify the correct representation.

Q. An element with a mass number of

81

31.7 %

more neutrons as compared to protons. Identify the element.

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

CHEMISTRY

Watch in App

explore_more_icon

Explore more

Standard IX Chemistry

Join BYJU'S Learning Program

CrossIcon