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WorksheetsCHEM Test 1 (12th) 21-22
Total questions: 11
Worksheet time: 6mins
What is the atomic number?
The number of protons in the nucleus of an atom
The number of neutrons in the nucleus of an atom
The number of protons and neutrons in the nucleus of an atom
What is the mass number?
The total number of neutrons in a nucleus.
The total number of protons and neutrons in a nucleus.
The total number of electrons in a nucleus.
What is an isotope?
Forms of the same element that contain equal numbers of neutrons but different numbers of protons in their nuclei
Forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei
None of the above
What is an isobar?
Each of two or more isotopes of different elements, with the same atomic weight.
Each of two or more isotopes of different elements, with different atomic weight.
None of the above
It is assumed that electrons behave as particles.
Bohr's Atomic Model
Schrödinger's Atomic Model
The majority of the atom's size is just empty space, also called vaccum.
Bohr's Atomic Model
Schrödinger's Atomic Model
We can predict the position of an electron by using Newtonian Mechanics.
Bohr's Atomic Model
Schrödinger's Atomic Model
Electrons behave not only as particles but also as waves.
Bohr's Atomic Model
Schrödinger's Atomic Model
Since electrons behave also as waves, Newtonian Mechanics became obsolete therefore:
Classical Mechanics was developed
Quatum Mechanics was developed
Heisenberg proposed that:
it is possible to find simultaneously the position and momentum of an electron
it is not possible to find simultaneously the position and momentum of an electron
The Wave-Mechanical Model was proposed by Schrödinger in:
1931
1913
1926
