Our understanding of the atom has changed over time. Which idea that was once accepted is now considered scientifically inaccurate?

A.
The nucleus is the center of the atom.

B.
An atom is solid material.

C.
Electrons have a negative charge.

D.
Electrons are arranged in layers.

Question

Our understanding of the atom has changed over time. Which idea that was once accepted is now considered scientifically inaccurate?
	
	
 
A.
	The nucleus is the center of the atom.
	
 
B.
	An atom is solid material.
	
 
C.
	Electrons have a negative charge.
	
 
D.
	Electrons are arranged in layers.

kaylaprincess · Answer

What's an Atom now? .... An Atom is composed of particles called protons, electrons and neutrons. Protons carry a positive electrical charge, electrons carry a negative electrical charge and neutrons carry no electrical charge at all. The protons and neutrons cluster together in the central part of the atom, called the nucleus, and the electrons 'orbit' the nucleus. A particular atom will have the same number of protons and electrons and most atoms have at least as many neutrons as protons.

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