In the nuclear model, where are the three subatomic particles located?
Protons and neutrons are in the tiny central nucleus; electrons are outside the nucleus.
AQA GCSE Combined Science: Trilogy (8464) — Chemistry — Foundation · 5.1.1.4
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In the nuclear model, where are the three subatomic particles located?
Protons and neutrons are in the tiny central nucleus; electrons are outside the nucleus.
What are the relative electrical charges of the three subatomic particles?
Why does an atom have no overall electrical charge?
It has equal numbers of protons and electrons, so their positive and negative charges cancel.
Why does a neutral atom have no overall charge?
It has equal numbers of protons and electrons, so their positive and negative charges balance.
What is an atom’s atomic number?
The number of protons in its nucleus.
What determines which element an atom is?
Its atomic number, or number of protons.
What is an atom’s mass number?
The total number of protons and neutrons in its nucleus.
How can you calculate the number of neutrons from an atom’s atomic and mass numbers?
Subtract the atomic number from the mass number.