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The number of subatomic particles in atoms so far discovered is more than:
NETNUST Entry TestChemistryBasic Concepts of Chemistry
Atoms can be evident by the use of electron microscope, field ionization microscope and :
NETNUST Entry TestChemistryBasic Concepts of Chemistry
Determination of atomic masses and invention of system of writing symbols was made by :
NETNUST Entry TestChemistryBasic Concepts of Chemistry
First atomic theory was put forward by an English school teacher :
NETNUST Entry TestChemistryBasic Concepts of Chemistry
Non-metals tend to gain electrons, becoming:
NETNUST Entry TestChemistryBasic Concepts of Chemistry
Metals tend to lose electrons, becoming
NETNUST Entry TestChemistryBasic Concepts of Chemistry
Atoms and molecules can either gain or lose electrons, forming charged particles called:
NETNUST Entry TestChemistryBasic Concepts of Chemistry
Covalent compounds mostly exist in the form of :
NETNUST Entry TestChemistryBasic Concepts of Chemistry
Swedish chemist J.Berzelius determined:
NETNUST Entry TestChemistryBasic Concepts of Chemistry
The diameter of atoms is of the order
NETNUST Entry TestChemistryBasic Concepts of Chemistry
$CO^{+}$ is an example of
NETNUST Entry TestChemistryBasic Concepts of Chemistry
When an electron is added to a unipositive ion we get:
NETNUST Entry TestChemistryBasic Concepts of Chemistry
The number of atoms present in a molecule determines its :
NETNUST Entry TestChemistryBasic Concepts of Chemistry
Matter is defined as anything which occupies space and:
NETNUST Entry TestChemistryBasic Concepts of Chemistry
Smallest particle of an element which may or may not have independent existence is known as:
NETNUST Entry TestChemistryBasic Concepts of Chemistry
The branch of science dealing with structure, composition and changes in matter and laws and principles which govern these changes is called as:
NETNUST Entry TestChemistryBasic Concepts of Chemistry
Number of transitions possible for an electron in the 6th shell are
NETNUST Entry TestChemistryAtomic Structure
If an electron jumps from fourth to first orbit, which of the following series will it show?
NETNUST Entry TestChemistryAtomic Structure
Brackett series of H-atom is in which of the following regions of electromagnetic spectrum?
NETNUST Entry TestChemistryAtomic Structure
When alpha particles are bombarded on beryllium, __________ is formed.
NETNUST Entry TestChemistryAtomic Structure
d subshell has
NETNUST Entry TestChemistryAtomic Structure
Which quantum number decides energy of orbitals?
NETNUST Entry TestChemistryAtomic Structure
Which of the following quantum numbers are for p-subshell?
NETNUST Entry TestChemistryAtomic Structure
In a discharge tube, at room pressure there is
NETNUST Entry TestChemistryAtomic Structure
Which orbitals always possess same energy
NETNUST Entry TestChemistryAtomic Structure