Font size
WorksheetsAtoms and changes
Total questions: 25
Worksheet time: 16mins
What is the smallest subatomic particle that all matter is made of?
Protons
Electrons
Neutrons
Nucleus
Where are protons found in an atom?
Nucleus
Electrons
Neutrons
Bohr model
What is the charge of protons?
Positive
Negative
No charge
Neutral
What is the charge of an electron?
Positive
Negative
No charge
Neutral
What is the charge of a neutron?
Positive
Negative
No charge
Neutral
Where are electrons located in an atom?
In the nucleus
With protons
With neutrons
In orbit of the nucleus.
What is the Atomic Mass Number?
The total number of Protons and Neutrons found in an atom's nucleus.
The total number of Protons and Electrons found in an atom.
The total number of Electrons and Neutrons found in an atom.
The total number of Protons, Neutrons, and Electrons found in an atom.
What is the relationship between the number of protons and the number of electrons in an atom?
They are equal
They are opposite
They are random
They are unrelated
What is the atomic mass number of an atom with 20 protons and 3 neutrons?
23
22
21
20
What is the atomic mass number of an atom with 6 protons and no neutrons?
(a)
5
4
3
What is the atomic mass number of this atom?
1
3
4
7
Label the Parts of the atom.
Electrons
Protons
Neutron
If you have a AMN of 24 and have 16 Electrons, you have (a) Protons and (b) Neutrons.
What is the role of protons in an atom?
They control the type of atom
They control the size of the atom
They control the charge of the atom
They control the stability of the atom
What is an isotope?
Atoms with the same number of protons but different number of neutrons
Atoms with the same number of protons but different number of electrons
Atoms with the same number of neutrons but different number of protons
Atoms with the same number of electrons but different number of protons
Do all atoms have natural isotopes?
Yes
No
Only some atoms have isotopes
Isotopes are man-made
What are the physical properties of oxygen?
Colorless, odorless, gas
Red, smelly, liquid
Yellow, odorless, solid
Blue, smelly, gas
What happens when the nucleus of an atom decays over time?
It releases energy over time
It transforms into a different element
It becomes radioactive
It loses its protons
What are ions?
Atoms that have gained or lost electrons
Atoms that have gained or lost protons
Atoms that have gained or lost neutrons
Atoms that have gained or lost energy
What is the charge of an anion?
Positive
Negative
Neutral
Variable
What is the charge of a cation?
Positive
Negative
Neutral
Variable
What is the role of electrons in atoms?
Determine the size of the atom
Determine the charge of the atom
Determine the stability of the atom
All of the above
What is the atomic number of an atom?
The number of protons in the nucleus
The number of neutrons in the nucleus
The number of electrons in the nucleus
The number of isotopes in the nucleus
What is an anion?
An atom with more of a positive charge
An atom with more of a negative charge
What is an cation?
An atom with more of a positive charge
An atom with more of a negative charge
