WorksheetsAtoms Assessment
Total questions: 20
Worksheet time: 18mins
Which subatomic particle has a positive charge?
Electron
Neutron
Proton
Nucleus
What is the atomic number of an atom?
The number of protons in the nucleus
The number of electrons in the atom
The number of neutrons in the atom
The number of valence electrons in the atom
What is the charge of an atom with 6 protons and 8 electrons?
Which statement is true about isotopes?
Isotopes have the same number of protons but different numbers of neutrons.
Isotopes have the same number of protons and neutrons.
Isotopes have the same number of electrons but different numbers of protons.
Isotopes have the same number of electrons as the element they are isotopes of.
How many electrons can the first energy level hold?
2
6
8
10
Which subatomic particle is responsible for chemical bonding?
Proton
Electron
Neutron
Nucleus
What is the atomic mass of an atom?
The sum of the number of protons and electrons in the atom
The number of neutrons in the atom
The average mass of all the isotopes of the element
The number of valence electrons in the atom
Which statement is true about ions?
Ions are atoms that have gained or lost protons.
Ions are atoms that have gained or lost neutrons.
Ions are atoms that have gained or lost electrons.
Ions are atoms that have gained or lost energy levels.
How do atoms become ions?
By gaining or losing protons
By gaining or losing neutrons
By gaining or losing electrons
By gaining or losing energy levels
What is the charge of an ion with 9 protons and 10 electrons?
What is the name of the particles that make up the nucleus of an atom?
Protons and electrons
Protons and neutrons
Electrons and neutrons
Electrons and protons
Which term describes atoms of the same element with a different number of neutrons?
Isotopes
Ions
Molecules
Compounds
How do you determine the number of neutrons in an atom?
By subtracting the number of protons from the atomic mass
By subtracting the number of electrons from the atomic number
By dividing the atomic mass by the number of protons
By dividing the atomic number by the number of electrons
Which subatomic particle has negligible mass?
Electron
Proton
Neutron
Nucleus
What is the name for the region where electrons are most likely to be found in an atom?
Nucleus
Energy level
Subatomic shell
Electron cloud
How many valence electrons does an atom of oxygen have?
1
2
6
8
What is the smallest unit of an element that retains the properties of that element?
Molecule
Atom
Compound
Isotope
What does the atomic number represent?
The number of neutrons in the nucleus
The number of electrons in the atom
The number of protons in the nucleus
The number of valence electrons in the atom
What is the charge of an ion with 11 protons and 10 electrons?
Which term describes a combination of two or more atoms?
Isotope
Ion
Molecule
Compound
