If atom has a mass number of 23 and its atomic number 11, then number of protons are:
Correct answer: A. 11
- A. 11
- B. 23
- C. 12
- D. 22
Explanation
The atomic number represents the number of protons in the nucleus, so if atomic number is 11 it means number protons is 11.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Fundamental Concepts of Chemistry
Mole calculations connect mass, number of particles and Avogadro's number, while balanced equations provide the mole ratios used in stoichiometry. Questions cover limiting and excess reactants, theoretical yield and percentage yield, including identifying which reactant is consumed first and comparing the actual product with the maximum possible product.
Practise Fundamental Concepts of Chemistry
894 free Fundamental Concepts of Chemistry MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Chemistry questions like this
Chemistry is on 14 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Fundamental Concepts of Chemistry questions
Chlorine (Cl) has relative atomic mass 35.5 this half number is due to:
The maximum No. of moles are present in
The number of molecules of water that one needs to put in a jar to make the total mass equal to 10.8 kg are:
A compound X contains 50% sulphur and 50% oxygen by mass what is the empirical formula of X?
Absorption of carbon dioxide in KOH solution during combustion analysis is:
An acid with molecular mass 104 contains 34.6% carbon 3.85% hydrogen and rest is oxygen the molecular formula of acid is: