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Who was the first to propose that most of the mass of an atom is in the tiny dense positively charged nucleus?
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∙ 12y ago
Greek philosopher Democritus.
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∙ 12y ago
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Which part of a helium atom is positively charged?
nucleus the nucleus contains protons (positive) and neutrons (neutral). The nucleus is always the positively charged, dense center of an atom.
Small dense positively charged nucleus?
Yes.
What is the tiny dense positively charged center of an atom?
Nucleus
Who said there's a small dense positively charged nucleus?
Ernest Rutherford
What did Rutherford add to the atomic model?
He discovered that an atom has a very dense and very tiny positively charged nucleus. He named the positively charged particles protons.
How can you describe in words ruthfords model of the atom?
the atom as a tiny, dense, positively charged core called a nucleus
Who modeled the atom with electrons that move in fixed circular paths around a dense positively charged nucleus?
Niels Bohr
Rutherfords experiments lead to the discovery of what?
Earnest Rutherford's experiment,"Gold Foil", led to the discovery the of a Small,dense and positively charged Nucleus
What did ernest rutherford conclude about the nucleus of an atom?
Rutherford claimed that at the center of an atom there was a very tiny, very dense, positively charged part called a nucleus, surrounded by electrons at a distance.
What did Rutherford picture an atom as?
A short answer for the Rutherford atomic model: the atom is composed from a central part - a nucleus, positively charged, surrounded by electrons - very small negative charged particles.
What is the internal structure of an atom?
The atom is a basic unit of matter that consists of a dense central nucleus surrounded by a cloud of negatively charged electrons. The atomic nucleus contains a mix of positively charged protons and electrically neutral neutrons. The electrons of an atom are bound to the nucleus by the electromagnetic force
What did Rutherford gold foil experiment suggest about the structure of an atom?
1) Atoms were mostly empty space (because most alpha particles went straight through the gold foil) 2) Atoms had a dense nucleus (because few alpha particles bounced straight back from the atoms) 3) The nucleus of atoms were positively charged (some alpha particles were deflected at large angles)
