Advertisements
Advertisements
प्रश्न
Define: Ions
Advertisements
उत्तर
An atom which becomes charged by losing or gaining electrons is called an ion.
APPEARS IN
संबंधित प्रश्न
Write the names of the elements present in the following compound.
Common salt
Write the names of the elements present in the :-
Sulphuric acid
Give two examples for each of ionic and covalent bond.
An atom has 13 protons and 14 neutrons.
How many electrons would be present in this atom ?
State two observations which show that atom is not indivisible.
Give scientific reason.
All the mass of an atom is concentrated in the nucleus.
Draw diagrams representing the atomic structures of the following:
- Sodium atom
- Chlorine ion
- Carbon atom
- Oxygen ion
Draw the electron dot structure of this compound.
Elements X and Y have 1 and 7 electrons in their outermost shell respectively.
Which will form negative ion?
Elements X and Y have 1 and 7 electrons in their outermost shell respectively.
What will be the charge present of the molecule XY after chemical combination?
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.
Select the correct answer to the statement given below:
The smallest particle of a substance – capable of independent existence and which retains the characteristics of the substance.
Define the following term with an example.
Element
Project.
To have an idea of what atoms are, students can be asked to construct atoms using pipe cleaners (thin metal wires-electron shells), pompoms (balls-different colours for protons and neutrons) and beads (electrons). Students will love and enjoy putting them together and they look great hanging from the ceiling in the classroom.
Define the following term with an example.
Compound
______ is the smallest particle of an element.
In the nucleus of `""_20"Ca"^40`, there are ______
Atoms of different elements having ______ mass numbers, but ______ atomic numbers are called isobars.
Atoms of different elements having the same number of ______ are called isotones.
The most abundant type of atom is the universe is ______.
