WorksheetsAtoms and Isotopes
Total questions: 20
Worksheet time: 14mins
How many electrons does an uncharged (neutral) atom if neon have?
9
10
8
11
True or False: Neutrons have a negative charge.
True
False
What is an isotope?
Two atoms of the same element with different numbers of protons
A charged atom
A neutral atom
Two atoms of the same element with different numbers of neutrons
How many neutrons does this isotope of lithium have?
3
4
8
5
What is the atomic number for an element with 3 protons?
2
3
6
1
What quantities vary between isotopes of an element?
Neutrons and mass number
Neutrons and electrons
Protons, electrons, and atomic number
Protons, electrons, and atomic mass
The positive particles of an atom are
Protons
Electrons
Positrons
Neutrons
Which two components of an atom contribute to the mass?
Neutrons and electrons
Protons and neutrons
Protons and electrons
The central region of an atom, where its neutrons and protons are found, is called the
Nucleus
Center
Electron cloud
Core
All matter is made of what?
Electrons
Energy
Compounds
Atoms
In a correctly written symbol, what would be located in the "A" position?
Mass number
Number of neutrons
Number of electrons
Atomic number
In a correctly written symbol, what would be located in the "Z" position?
Mass number
Element's symbol
Number of electrons
Atomic number
In a correctly written symbol, what would "X" represent?
Mass number
Element symbol
Atomic number
Atomic mass
What is wrong with this Bohr Model?
Nothing. It's fine.
It has the wrong number of total electrons.
It has the wrong number of electrons on the first energy level.
It has the wrong number of electrons on the second energy level.
What element is this?
Boron
Lithium
Oxygen
Sulfur
What element is this?
O
Cl
Na
There's a number of elements it could be!
In the following pair, are they isotopes or different elements.
Element x has 6 protons and 7 neutrons.
Element y has 7 protons and 7 neutrons.
isotopes of same element
different elements
In the following pair, are they isotopes or different elements.
Element x has 27 protons and 82 neutrons.
Element y has 27 protons and 83 neutrons.
isotopes of same element
different elements
An isotope of an element has the same number of _________, but a different number of _________.
Protons, electrons
Protons, neutrons
Electrons, neutrons
Neutrons, protons
Which is the best nuclear symbol for a potassium atom with 21 neutrons?
