WorksheetsChemistry Quiz: Atoms, Nuclei, and Isotopes
Total questions: 10
Worksheet time: 5mins
Who mathematically proved the existence of atoms and molecules in 1905?
Marie Curie
Albert Einstein
Isaac Newton
Niels Bohr
What is the defining characteristic of any element?
Atomic number
Atomic mass
Number of electrons
Number of neutrons
What is the role of neutrons in the nucleus of an atom?
They determine the chemical properties of the atom
They stabilize the nucleus and give it additional mass
They repel protons
They determine the atomic number
Why are relative atomic masses never whole numbers?
Because of the number of electrons
Because of the number of protons
Because of the different isotopes of the same element
Because of the number of neutrons
Where does all the interesting chemical activity happen in an atom?
In the neutrons
In the protons
In the nucleus
In the electrons
What is the chemical symbol for silver?
Si
Au
Sv
Ag
What is the mass number of an isotope?
The total number of protons and neutrons in the nucleus
The number of neutrons in the nucleus
The average atomic mass of all the atoms of that element
The number of protons in the nucleus
What is the role of the strong nuclear force in the nucleus?
It stabilizes the nucleus
It repels protons
It determines the atomic number
It determines the chemical properties
What is the correct pronunciation of 'nucleus'?
NU/cue/lus
NU/clee/us
NU/clear/us
NYOO/coo/los
What determines the atomic number of an element?
The average atomic mass of all the atoms of that element
The number of electrons in the atom
The number of protons in the nucleus
The total number of nucleons in the nucleus
