A neutral subatomic particle found in the nucleus of an atom that has no electric charge but contributes to the atom's mass.
The glue that helps hold the nucleus together without adding charge.
Showing a random 20 of 50 problems.
Example 1
easy
What is the symbol used for the neutron in nuclear equations?
Example 2
medium
Explain why neutrons are important for nuclear stability. Why do heavier elements tend to have more neutrons than protons?
Example 3
medium
An atom has 9 protons and 10 neutrons. What is its mass number?
Example 4
challenge
Why do carbon-12 and carbon-14 react identically in chemical reactions yet differ in nuclear behavior?
Example 5
medium
Why does adding neutrons eventually make some nuclei unstable (radioactive)?
Example 6
easy
Compared to a proton, how heavy is a neutron?
Example 7
easy
An atom has mass number 14 and atomic number 6. How many neutrons does it have?
Example 8
challenge
U-235 absorbs a neutron and splits to give Ba-141, Kr-92, and several free neutrons. Use conservation of nucleons to find how many free neutrons are released.
Example 9
medium
Why can two atoms with the same number of protons have different masses?
Example 10
easy
Do neutrons determine the chemical properties of an atom?
Example 11
easy
Does the number of neutrons change when a neutral atom becomes a positive ion by losing electrons?
Example 12
medium
Two isotopes of an element have mass numbers 35 and 37 and atomic number 17. How many neutrons does each have?
Example 13
easy
How many neutrons does hydrogen-1 (the most common hydrogen) have?
Example 14
easy
Which subatomic particle was discovered last: proton, neutron, or electron?
Example 15
easy
Where in the atom are neutrons located?
Example 16
medium
Carbon-13 has how many neutrons?
Example 17
hard
In a nuclear equation, 714N+01n→614C+X. Identify X and explain why neutron count rises by 1 in the carbon product.
Example 18
medium
Silver-109 has 47 protons. State the number of neutrons and the number of nucleons.
Example 19
easy
Which two particles in the nucleus contribute most of an atom's mass?
Example 20
medium
An atom of an element has 17 protons and 18 neutrons. What is its mass number, and name the element?