Advertisements
Advertisements
Question
If bromine atom is available in the form of, say, two isotopes `""_35^79Br (49.7%)" and """_35^81Br (50.3%)`, calculate the average atomic mass of bromine atom.
Advertisements
Solution
It is given that two isotopes of bromine are `""_35^79Br (49.7%)" and """_35^81Br (50.3%)`
Then, the average atomic mass of the bromine atom is given by:
= `79xx(49.7/100)+81xx(50.3/100)`
= `3926.3/100+4074.3/100`
= `8000.6/100`
= 80.006 u
= 80 u (approx)
APPEARS IN
RELATED QUESTIONS
TRUE \ FALSE
Elements combine in definite proportions to form compounds.
TRUE \ FALSE
Neils Bohr gave the theory to explain the arrangement of protons in an atom.
WRITE SHORT ANSWER
Name three inert gases.
Fill in the blank
An ion with positive charge is called ______
Who originated the word ‘atom’ ?
What does the word ‘atom’ mean?
Name the particle or particles you would expect to find in :
The orbit of an atom
Name the particle or particles you would expect to find in :
The nucleus of an atom
For the symbols H, D and T, write the subatomic particles (protons, neutrons and electrons) found in each one of them.
Which of the following statement is correct about the atom of an element ?
Give brief information of three subatomic particles with reference to electrical charge, mass and location.
Name the gas that.
Turns moist starch iodide paper blue black.
State the meaning of the term – (a) atom, (b) molecule, (c) radical – with a suitable example.
Draw the basic structure of an atom representing its –
- Subatomic particles
- Nucleus
- Orbits or shells.
A radical take part – unsplit in a chemical reaction and retains its identity in reactions.
With reference to the radical –
- ammonium
- bisulphate
- carbonate
state the group of atoms present in each radical.
The smaller particles found in the atom is called ______.
State true or false. If false, correct the statement.
An atom is electrically neutral.
An atom of an element has no electron. Will that atom have any mass or not? Can an atom exist without electron? If so then give example.
The smallest unit of an element is ______.
