WorksheetsUnderstanding Atomic Structure and Particles
Total questions: 15
Worksheet time: 8mins
What is the charge of an electron?
Positive
Negative
Neutral
Variable
Which subatomic particle is found in the nucleus and has no charge?
Electron
Proton
Neutron
Photon
What does the atomic number of an element represent?
The number of electrons
The number of neutrons
The number of protons
The number of orbitals
What is the mass number of an atom?
The total number of electrons
The total number of protons and neutrons
The total number of protons and electrons
The total number of neutrons
What is a mole in chemistry?
A unit representing 6.022 × 10^23 entities
A unit representing 1.602 × 10^-19 entities
A unit representing 9.109 × 10^-31 entities
A unit representing 3.00 × 10^8 entities
What is an isotope?
An element with the same mass number but different atomic numbers
An element with the same atomic number but different mass numbers
An element with the same number of electrons but different protons
An element with the same number of neutrons but different electrons
Where are electrons most likely to be found in an atom?
In the nucleus
In orbitals around the nucleus
In the proton cloud
In the neutron field
What is a valence electron?
An electron in the innermost shell
An electron in the outermost shell
An electron in the nucleus
An electron in a photon
What is the charge of a proton?
Negative
Positive
Neutral
Variable
What is the unified atomic mass unit (u or amu) approximately equal to?
The mass of an electron
The mass of a proton or neutron
The mass of a photon
The mass of a mole
What is a photon?
A particle of matter with mass
A quantum of electromagnetic radiation
A subatomic particle with charge
A unit of atomic mass
Which of the following particles is found outside the nucleus?
Proton
Neutron
Electron
Photon
What is the dense center of an atom called?
Electron cloud
Nucleus
Orbital
Photon field
Which of the following is involved in chemical bonding?
Neutron
Proton
Valence Electron
Photon
What defines the element of an atom?
The number of neutrons
The number of electrons
The number of protons
The number of orbitals
