NEW
Font size
WorksheetsAtomic structure
Total questions: 22
Worksheet time: 12mins
What is the smallest unit of matter? It is composed of protons and neutrons, held together in the nucleus, and electrons around the nucleus in different electron orbitals, which form an electron cloud.
cell
nucleus
atom
electron
What are any of the various self-contained units of matter or energy that are fundamental parts of all matter. These particles include electrons, protons, and neutrons.
subatomic particles
elements
nucleus
electron cloud
What is a subatomic particle with a positive charge that is in the nucleus of an atom?
neutron
proton
electron
valence electron
What is a subatomic particle without an electric charge, located in the nucleus of an atom?
neutron
proton
electron
valence electron
What is a subatomic particle with a negative charge? It is found in the electron cloud surrounding the nucleus.
neutron
proton
electron
electron cloud
What is the system of electrons surrounding the nucleus of an atom?
valence electrons
nucleus
electrons
electron cloud
What is the center of an atom containing protons and neutrons?
nucleus
neutron
proton
electron cloud
What is the number of protons in the nucleus of an atom that determines the chemical properties of an atom?
mass number
atomic mass
atomic number
atomic symbol
What is the combined mass of all the protons and neutrons of an atom and is approximately equal to the number of protons and neutrons?
atomic mass
atomic number
subatomic particles
nucleus weight
What is material that has mass and takes up space?
volume
mass
matter
density
The atomic number identifies the number of __________.
electrons
atoms
protons
neutrons
The number 16 for the atomic element sulfur is the
ionic number
isotope
atomic mass
atomic number
How many protons does sulfur have?
32
16
48
12
How many electrons does sulfur have
16
32
48
12
