WorksheetsAtomic Structure
Total questions: 27
Worksheet time: 16mins
True or False - Protons and Neutrons have the same mass.
The name of this particle means indivisible and is one of the fundamental building blocks of matter
molecule
compound
atom
isotope
The mass of an atom is
equal to the number of protons
the protons + electrons
the protons + neutrons
the protons + neutrons + electrons
In a electrically neutral atom,
protons = electrons
protons = neutrons
neutrons = electrons
protons = neutrons = electrons
the number of protons plus neutrons
the number of protons plus electrons
What is the smallest unit of matter that retains the properties of the substance?
cell
nucleus
atom
electron
What is the center of an atom containing protons and neutrons?
nucleus
neutron
proton
electron cloud
What mass does a neutron have?
1 amu
0 amu
-1 amu
+2 amu
Which element has an atomic # of 13?
Nitrogen
Yttrium
Aluminum
Carbon
Which element has an atomic # of 20?
Neon
Fluorine
Calcium
Iodine
Which of the following best describes the density of an atom?
most of the mass occupies the large electron cloud
most of the mass occupies the very small nucleus
the mass is evenly split between the electron cloud and the nucleus
it depends
Calculation used to find the number of neutrons in an atom
Mass Number- Atomic Number
Atomic Number - Mass Number
Mass Number - Electrons
protons = electrons = neutrons
The scientist in the 1800s who developed the atomic theory was named:
Wilhelm Roentgen
John Dalton
Marie Curie
John John
All atoms of different elements share the same mass and properties
True
False
