Advertisements
Advertisements
प्रश्न
Define: Chemical bond
Advertisements
उत्तर
Chemical bond— A chemical bond is the binding force between two or more atoms of a molecule.
APPEARS IN
संबंधित प्रश्न
Write the names of `"FeS"` compounds :
Fill in the blank:
Atoms are _____
Define: Relative atomic mass
Name three non-metals/radicals which have valency -1, -2, and -3.
Name the particle or particles you would expect to find in :
The nucleus of an atom
Fill in the blank
A charged particle is called an _____
Fill in the blank
An _______ is electrically neutral.
Fill in the following blanks with suitable words :
In water, the proportion of oxygen and hydrogen is .............. by mass.
How many times is a proton heavier than an electron?
An atom of element E contains 3 protons, 3 electrons and 4 neutrons :
(a) What is its atomic number?
(b) What is its mass number?
(c) Write the electronic configuration of the element E.
(d) State whether element E is a metal or non-metal. Why?
(e) What type of ion, cation or anion, will be formed by an atom of element E? Why
(f) Write the symbol of the ion formed by an atom of element E.
(g) What could element X be?
How many atoms are there in exactly 12 g of carbon-12 element ? (C = 12 u)
Match the pairs.
| Group 'A' | Group 'B' |
| a. Proton | i. Negatively charged |
| b. Electron | ii. Neutral |
| c. Neutron | iii. Positively charged |
Draw diagrams representing the atomic structures of the following:
- Sodium atom
- Chlorine ion
- Carbon atom
- Oxygen ion
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.
Define the following term with an example.
Metalloid
Which of the following statements made by Dalton has not undergone any change?
In all atoms of an element
1 mole of Gold and Silver contain same number of atoms.
The first scientific theory about atoms was given by J J. Thomson.
