Advertisements
Advertisements
प्रश्न
What are polyatomic ions? Give two examples.
Advertisements
उत्तर
A polyatomic ion, also known as a molecular ion, is a charged chemical species (ion) composed of two or more atoms covalently bonded or of a metal complex that can be considered to be acting as a single unit. The prefix poly- means "many," in Greek, but even ions of two atoms are commonly referred to as polyatomic.
Examples: Carbonate (CO32-), sulphate (SO42-), nitrate - NO3- and hydroxide ions OH- are all polyatomic ions.
APPEARS IN
संबंधित प्रश्न
Explain the need for a reference atom for atomic mass. Give some information about two reference atoms.
Define the following form:
Atomic mass number
Define atomic mass unit.
Define the term:
Mass number
A hydrocarbon contains 4.8g of carbon per gram of hydrogen. Calculate the gram atom of each.
Write down the mass number of the atom having 20 neutrons and 15 protons.
What would be the reason for an element to have atoms with different mass numbers?
Select the correct answer from the answer in the bracket to complete the sentence.
An atom with electronic configuration 2, 7 and mass number 19 will have ________ neutrons.
Give a reason for the following:
The mass number of an atom is slightly less than the actual atomic mass.
Draw the structure of oxygen and sulphur atoms.
The sum of the numbers of protons and neutrons of an atom is called its ______
Relative atomic mass is otherwise known as ______.
The average atomic mass of hydrogen is ______ amu.
Calculate the % of each element in calcium carbonate. (Atomic mass: C-12, O-16, Ca -40)
Calculate the % of oxygen in Al2(SO4)3. (Atomic mass: Al-27, O-16, S -32)
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?
If the atomic mass unit ‘u’ were defined to be `1/5 "th"` of the mass of an atom of C-12, what would be the atomic weight of nitrogen in amu or ‘u’ in this state? Atomic weight of N on the conventional scale is 14.
