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WorksheetsExploring Atomic Structure and Elements
Total questions: 10
Worksheet time: 5mins
What are the three main subatomic particles in an atom?
Protons, neutrons, and electrons
Protons, electrons, and positrons
Protons, quarks, and neutrinos
Neutrons, electrons, and muons
Define isotopes and give an example.
Isotopes are elements with different atomic numbers.
Example of an isotope: Oxygen-16 and Oxygen-18 are the same element.
Isotopes have the same number of neutrons but different protons.
Isotopes are variants of a chemical element with the same number of protons but different numbers of neutrons. Example: Carbon-12 and Carbon-14.
Calculate the mass number of an atom with 6 protons and 8 neutrons.
10
12
16
14
What is the charge of a neutron?
-1
+2
0
+1
How do you determine the number of electrons in a neutral atom?
The number of electrons is determined by the mass of the atom.
Electrons are always equal to the number of protons plus neutrons.
The number of electrons in a neutral atom is equal to its atomic number.
The number of electrons can vary regardless of the atomic number.
Explain the significance of the atomic number.
The atomic number signifies the identity of an element and its position in the periodic table.
The atomic number determines the mass of an element.
The atomic number indicates the number of neutrons in an atom.
The atomic number is irrelevant to chemical reactions.
How do isotopes of the same element differ from each other?
Isotopes are formed from different elements.
Isotopes have different chemical properties.
Isotopes differ in the number of protons.
Isotopes differ in the number of neutrons.
What is the mass number of an isotope with 10 protons and 12 neutrons?
20
22
24
18
How many valence electrons does an oxygen atom have?
6
2
8
4
What is the difference between a cation and an anion?
Cations and anions are both neutral particles.
Cations are larger than anions in size.
A cation is positively charged, while an anion is negatively charged.
A cation is negatively charged, while an anion is positively charged.
