Advertisements
Advertisements
Question
Write down the mass number of the atom having 20 neutrons and 15 protons.
Advertisements
Solution
Mass number (A) = Neutrons (n) + Protons (p)
Mass number = 20 + 15 = 35
APPEARS IN
RELATED QUESTIONS
A 0.24 g sample of compound of oxygen and boron was found by analysis to contain 0.096 g of boron and 0.144 g of oxygen. Calculate the percentage composition of the compound by weight.
Define gram atomic mass of a substance. How much is the gram atomic mass of oxygen ?
What is meant by Unified Atomic Mass?
What are polyatomic ions? Give two examples.
Define atomic mass unit.
Choose the correct answer from the option given below.
Modern atomic symbols are based on the method proposed by
A hydrocarbon contains 4.8g of carbon per gram of hydrogen. Calculate the gram atom of each.
Select the correct answer from the answer in the bracket to complete the sentence.
An element has electronic configuration 2, 8, 1 and 12 neutrons. Its mass no. is ________.
Draw the structure of oxygen and sulphur atoms.
Mass of 1 mole of Nitrogen atom is ______
Which of the following represents 1 amu?
Noble gases are Diatomic.
The gram atomic mass of an element has no unit.
Write the different types of isotopes of oxygen and their percentage abundance.
Calculate the % relative abundance of B-10 and B-11, if its average atomic mass is 10.804 amu.
Chlorine exists in two isotopic forms, \[\ce{Cl-37}\] and \[\ce{Cl-35}\] but its atomic mass is 35.5. This indicates the ratio of \[\ce{Cl-37}\] and \[\ce{Cl-35}\] is approximately
An atom having atomic mass number 13 has 7 neutrons. What is the atomic number of the atom?
Atoms are so tiny their mass number cannot be expressed in grams but expressed in ______.
The ratio of masses of H and O in H2O is ______.
