click below
click below
Normal Size Small Size show me how
The Nuclear Atom
Question | Answer |
---|---|
J.J. Thomson used a cathode-ray tube to discover the [...] | J.J. Thomson used a cathode-ray tube to discover the electron |
Physicist Ernest [...] set out to test Thomson's plum pudding hypothesis about the atom. | Physicist Ernest Rutherford set out to test Thomson's plum pudding hypothesis about the atom. |
Rutherford bombarded a piece of [...] foil with a beam of radiation containing alpha particles. | Rutherford bombarded a piece of gold foil with a beam of radiation containing alpha particles. |
In Rutherford's experiment, most of the alpha particles passed through he gold foil, but some of the particles were [...]. | In Rutherford' experiment, most of the alpha particles passed through he gold foil, but some of the particles were deflected way off course. |
Rutherford correctly concluded that the positive charge of the atom was [...] somewhere inside the atom, and not spread out as Thomson had suggested. | Rutherford correctly concluded that the positive charge of the atom was densely concentrated somewhere inside the atom, and not spread out as Thomson had suggested. |
Rutherford discovered that atoms have a [...] | Rutherford discovered that atoms have a nucleus |
The positively charged particles of an atom are called [...]. | The positively charged particles of an atom are called protons. |
The negatively charged particles of an atom are called [...]. | The negatively charged particles of an atom are called electrons. |
A proton has a charge of [...] | A proton has a charge of +1 |
An electron has a charge of [...] | An electron has a charge of -1 |
1 proton balances out [...] electron. | 1 proton balances out 1 electron. |
James [...] presented evidence that the nucleus was made up of protons and neutrons. | James Chadwick presented evidence that the nucleus was made up of protons and neutrons. |
neutrons have a charge of [...] | neutrons have a charge of 0 |
The neutrally charged particles of an atom are called [...]. | The neutrally charged particles of an atom are called neutrons. |
The un-charged particles of an atom are called [...]. | The un-charged particles of an atom are called neutrons. |
There are [...] sub-atomic particles. | There are 3 sub-atomic particles. |
The sub-atomic particles are [...], neutrons, and electrons. | The sub-atomic particles are protons, neutrons, and electrons. |
protons and electrons have exactly [...] charges. | protons and electrons have exactly opposite charges. |
An electrically neutral atom will have the same number of protons and [...]. | An electrically neutral atom will have the same number of protons and electrons. |
Almost all the mass of an atom is in its [...]. | Almost all the mass of an atom is in its nucleus. |
electrons have almost no [...] | electrons have almost no mass |
Neutrons have about the same mass as [...]. | Neutrons have about the same mass as protons. |
The identity and properties of an element are determined by the number of [...] in each atom. | The identity and properties of an element are determined by the number of protons in each atom. |
The sub-atomic particles are protons, [...], and electrons. | The sub-atomic particles are protons, neutrons, and electrons. |
The sub-atomic particles are protons, neutrons, and [...]. | The sub-atomic particles are protons, neutrons, and electrons. |
Who conducted the gold-foil experiment? | Rutherford |