Advertisements
Advertisements
Question
What are polyatomic ions? Give two examples.
Advertisements
Solution
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
RELATED QUESTIONS
Define the atomic mass unit.
An ion with mass number 37 possesses one unit of negative charge. If the ion contains 11.1% more neutrons than the electrons, find the symbol of the ion.
Define gram atomic mass of a substance. How much is the gram atomic mass of oxygen ?
What is meant by Unified Atomic Mass?
What is meant by atomic mass number?
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.
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 element has electronic configuration 2, 8, 1 and 12 neutrons. Its mass no. is ________.
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.
Which of the following represents 1 amu?
The average atomic mass of hydrogen is ______ amu.
Write the different types of isotopes of oxygen and their percentage abundance.
Calculate the % of each element in calcium carbonate. (Atomic mass: C-12, O-16, Ca -40)
What are the postulates of Bohr’s model of an atom?
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 ______.
