Ibrahim is studying the behavior of electrons in an electric field. He learns that electrons are deflected towards the positive plate. What does this indicate about the electron?

The mass of an atom is mainly due to:

Ahmed is learning about early atomic models in his chemistry class. His teacher explains that John Dalton proposed the first scientific atomic theory. According to Dalton's model, what did he propose about atoms?

Mohamed is learning about the nucleus. He understands that the nuclear force holds the nucleus together. Why is the nuclear force necessary?

The outermost shell of an atom is called:

Xia is studying the history of atomic models. She learns that the quantum mechanical model is based on the wave-particle duality of electrons. Who proposed this concept?

Who discovered the nucleus?

Which subatomic particle has a positive charge?

An atom with mass number 23 and atomic number 11 has how many neutrons?

Bongani is studying the postulates of Rutherford's atomic model. He learns that Rutherford proposed that the nucleus is positively charged. What did he conclude about the size of the nucleus?