NLN NEX CHEMISTRY 2025 EXAM
QUESTIONS & DTAILED CORRECT
ANSWERS PASSED ALREADY GRADED
A+
Quantum Leaps
absorption and emission of quantum energy electrons moving in between orbits by making
jumps
Element
basic type of matter that cannot be broken down further
Atom
smallest unit of an element
Compound
combination of two or more types of elements
Molecule
two or more atoms bonded together
,Proton
found inside nucleus positive charge
Neutron
found inside nucleus no charge
Electron
found outside nucleus negative charge
Orbit
definite path
Orbital
region in space that is drawn to indicate the probability of finding an electron at a specific
location
Principle Quantum Number
indicates the main energy level occupied by the electron and distance orbital is located from the
nucleus
, Principle Quantum Number (n)
indicates energy level of electron describes shell and size of orbital
Subshell Quantum Number (l)
indicates the shape or type of subshell in which an electron is found
Magnum Quantum Number (m1)
describes the orientation of the orbital in space
Spin or Magnetic Quantum Number (ms)
describes direction of the spin of electron in orbital
Atomic Number
the number of protons in the nucleus of an atom
Mass Number
the sum of the number of neutrons and protons in an atomic nucleus
Isotopes
atoms of the same element with different numbers of neutrons
QUESTIONS & DTAILED CORRECT
ANSWERS PASSED ALREADY GRADED
A+
Quantum Leaps
absorption and emission of quantum energy electrons moving in between orbits by making
jumps
Element
basic type of matter that cannot be broken down further
Atom
smallest unit of an element
Compound
combination of two or more types of elements
Molecule
two or more atoms bonded together
,Proton
found inside nucleus positive charge
Neutron
found inside nucleus no charge
Electron
found outside nucleus negative charge
Orbit
definite path
Orbital
region in space that is drawn to indicate the probability of finding an electron at a specific
location
Principle Quantum Number
indicates the main energy level occupied by the electron and distance orbital is located from the
nucleus
, Principle Quantum Number (n)
indicates energy level of electron describes shell and size of orbital
Subshell Quantum Number (l)
indicates the shape or type of subshell in which an electron is found
Magnum Quantum Number (m1)
describes the orientation of the orbital in space
Spin or Magnetic Quantum Number (ms)
describes direction of the spin of electron in orbital
Atomic Number
the number of protons in the nucleus of an atom
Mass Number
the sum of the number of neutrons and protons in an atomic nucleus
Isotopes
atoms of the same element with different numbers of neutrons
