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प्रश्न
Name two particles found inside the nucleus. What are they collectively called ?
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उत्तर
Protons and Neutrons. Mass number.
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संबंधित प्रश्न
TRUE \ FALSE
Cathode rays are a stream of fast moving particles that travel in random directions.
Write the names of the elements present in the:-
Glucose
Fill in the blank
An ion with negative charge is called _______
Define: Chemical bond
Define: Relative atomic mass
Give two examples for each of ionic and covalent bond.
A certain particle ‘X’ has 17 protons, 18 electrons and 20 neutrons.
What is the atomic numebr of X ?
Fill in the blank
If an atom gains an electron, it is called an _______
How is the size of an atom indicated ?
How many times is a proton heavier than an electron?
One nm is equal to :
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?
The electronic configuration of an element Z is 2, 8, 8.
(a) What is the atomic number of the element?
(b) State whether element Z is a metal or a non-metal.
(c) What type of ion (if any) will be formed by an atom of element Z? Why?
(d) What is special about the outermost electron shell of the atom of this element?
(e) Give the name and symbol of element Z.
(f) Name the group of elements to which Z belongs.
Give brief information of three subatomic particles with reference to electrical charge, mass and location.
Draw diagrams representing the atomic structures of the following:
- Sodium atom
- Chlorine ion
- Carbon atom
- Oxygen ion
Draw the diagrams representing the atomic structures of the following: Neon
Select the correct answer to the statement given below:
The basic unit of matter is not capable of independent existence.
Define the following term with an example.
Metalloid
The most abundant type of atom is the universe is ______.
