WorksheetsUnderstanding Atomic Structure
Total questions: 20
Worksheet time: 10mins
What is the smallest unit of matter?
Electron
Quark
Atom
Molecule
Which particle has a positive charge?
Positron
Electron
Proton
Neutron
What is the charge of an electron?
-2 elementary charge
0 elementary charge
-1 elementary charge
+1 elementary charge
Who proposed the plum pudding model?
Albert Einstein
Ernest Rutherford
J.J. Thomson
Niels Bohr
What is the mass number of an atom?
The mass number is the total number of electrons in an atom.
The mass number is the average weight of an atom's isotopes.
The mass number is the number of protons in the nucleus of an atom.
The mass number is the sum of protons and neutrons in an atom.
Which subatomic particle determines the identity of an element?
Electron
Neutron
Quark
Proton
What is the main component of an atomic nucleus?
Photons and neutrinos
Quarks and leptons
Protons and neutrons
Electrons and positrons
Which model describes electrons in fixed orbits?
Particle model
Quantum model
Wave model
Bohr model
What is the maximum number of electrons in the first shell?
4
2
3
1
What is the electron configuration of carbon?
1s² 2s² 2p⁴
1s² 2s² 2p¹
1s² 2s² 2p²
1s² 2s² 3p²
Which particle has no charge?
positron
proton
electron
neutron
What is the atomic number of an element?
The atomic number is the number of neutrons in an atom.
The atomic number is the total number of electrons in an atom.
The atomic number represents the mass of an atom in atomic mass units.
The atomic number is the number of protons in an atom.
Who proposed the nuclear model of the atom?
Niels Bohr
J.J. Thomson
James Chadwick
Ernest Rutherford
What is the significance of the mass number?
The mass number indicates the atomic radius of an atom.
The mass number represents the number of electrons in an atom.
The mass number defines the chemical properties of an element.
The mass number signifies the total number of protons and neutrons in an atom.
How many protons are in a nitrogen atom?
5
7
8
6
What is the electron configuration of sodium?
1s² 2s² 2p⁶ 3p¹
1s² 2s² 2p⁶ 3s²
1s² 2s² 3s¹ 3p⁶
1s² 2s² 2p⁶ 3s¹
Which atomic model was developed by Rutherford?
Thomson model of the atom
Rutherford model of the atom
Bohr model of the atom
Dalton model of the atom
What is the relationship between atomic number and protons?
The atomic number is unrelated to the number of protons.
The atomic number is half the number of protons.
The atomic number is equal to the number of protons.
The atomic number is the sum of protons and neutrons.
What is the maximum number of electrons in the second shell?
6
10
8
4
What is the electron configuration of oxygen?
1s² 2s² 2p⁵
1s² 2s² 2p⁴
1s² 2s² 2p³
1s² 2s² 2p²
