Processing math: 100%

Home / Aptitude Tests / Chemistry / An element X has two...

An element X has two isotopes, $^{20} _{10}X$ and \(^{2...

An element X has two isotopes, $^{20} _{10}X$ and $^{22} _{10}X$ ,
present in the ratio 1:3. The relative atomic mass of X would be?

A.

20.5

B.

21.0

C.

21.5

D.

22.0

E.

22.5

View answer & explanation

Correct answer is C

The relative atomic mass will be [(20 * 1) + (3 * 22)] / (4)
(86)/(4) = (43)/(2) = 21.5

See all Chemistry questions & answers

See more JAMB questions & answers

Similar Questions

What is the chemical symbol for Bohrium? ...

What is the chemical symbol for Potassium? ...

Which of the following compounds will undergo additional reactions? ...

Which of the following gases is light than air?...

A gaseous metallic chloride MClx consists of 20.22% of M by mass. The formula of the chloride is? [...

The gas given off when NH4Cl is heated with an alkali is...

Use the diagram above to answer this question. The activation energy of the uncatalysed reaction is ...

The IUPAC name for the compound $ClCH_{2}CH_{2}OH$ is...

The following statements are correct except ...

In a chemical reaction, the change in concentration of a reactant with time is ...

Aptitude Tests

Situational Judgement Questions and Answers

Numerical Reasoning Questions and Answers

Data Interpretation Questions and Answers

Abstract Reasoning Questions and Answers

Personality Test

Quantitative Reasoning Questions and Answers

Spatial Reasoning Questions and Answers

Typing Speed and Accuracy Test

Logical Reasoning Questions and Answers

Verbal Reasoning Questions and Answers

Puzzles Questions and Answers

Microsoft Office Questions and Answers

Nigeria General Knowledge Questions and Answers

View latest jobs in Nigeria today