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WorksheetsAtomic Structure
Total questions: 10
Worksheet time: 5mins
What is the atomic number of an element?
The atomic number of an element is the number of protons in the nucleus of an atom.
The atomic number of an element is the number of electrons in the nucleus of an atom.
The atomic number of an element is the number of neutrons in the nucleus of an atom.
The atomic number of an element is the number of molecules in the nucleus of an atom.
How is the atomic mass of an element calculated?
By counting the number of protons and neutrons in the nucleus
By taking the weighted average of the masses of its isotopes.
By measuring the volume of the atom
By adding the number of protons and electrons in the atom
What is the atomic number of carbon?
6
3
8
12
What is the atomic mass of oxygen?
12.01 u
16.00 u
20.00 u
25.00 u
State the relationship between the number of protons and the atomic number.
The number of protons in an atom is unrelated to the atomic number.
The number of protons in an atom is half of the atomic number.
The number of protons in an atom is equal to the atomic number.
The number of protons in an atom is equal to the mass number.
Explain the concept of isotopes in relation to atomic mass.
Isotopes are atoms of different elements with the same atomic mass.
Isotopes are atoms of the same element with different atomic masses due to different number of protons.
Isotopes are atoms of the same element with different atomic masses due to different number of neutrons.
Isotopes are atoms of the same element with the same atomic mass.
What is the atomic number of an element with 6 protons?
6
2
10
4
Calculate the atomic mass of an element with 18 protons and 22 neutrons.
18
22
60
40
What is the significance of the atomic number in determining the identity of an element?
It determines the number of protons in the nucleus of an atom.
It determines the color of the element.
It determines the number of electrons in the nucleus of an atom.
It indicates the mass of the atom.
Differentiate between atomic number and atomic mass.
Atomic number represents the number of protons in an atom, while atomic mass represents the total mass of protons, neutrons, and electrons in an atom.
Atomic number represents the total mass of protons, neutrons, and electrons in an atom, while atomic mass represents the number of protons in an atom.
Atomic number is the same as atomic mass.
Atomic number represents the number of electrons in an atom, while atomic mass represents the total mass of electrons in an atom.
