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The smallest particle that still retains an element’s chemical properties is called…
Atom
Positively charged particle inside the nucleus…
Proton
A subatomic particle of an atom that is negatively charged and orbits the nucleus extremely fast.
Electron
Are electrons bigger than protons?
No
The basic building blocks combine to form...
Matter
Protons and neutrons together determine...
Mass number
What makes up most of an atom's volume?
Empty space
Atoms consist of smaller particles called...
Subatomic particles
The number of protons in a nucleus is called...
Atomic number
Why are neutrons neutral?
They have no charge
Why do protons repel each other?
They have the same positive charge
Why is the nucleus very dense?
It holds most of the mass
Why are neutrons important in the nucleus?
They help keep the nucleus stable
Why does removing an electron require energy?
The nucleus attracts it strongly
Why does changing the nucleus create a different element?
The proton number changes
The number of __________ decides what element an atom is.
Number of protons
