STRUCTURE OF ATOM

Which particle has a positive charge?

• electron
• orbital
• proton
• neutron

Most of the mass in an atom is made up of _____________________?

• protons and electrons
• protons and neutrons
• neutrons and electrons
• electrons and quarks

What is the electrical charge of a proton?

• 1+
• 1-
• neutral
• 2-

He found that atoms have smaller parts and found negative electrons that he theorized were surrounded in a sphere of positive charges

• J.J. Thomson
• Ernest Rutherford
• Niels Bohr
• James Chadwick

He found the positively charged protons in the nucleus and said that electrons moved around the nucleus

• J.J. Thomson
• Ernest Rutherford
• Niels Bohr
• James Chadwick

He found that electrons have specific amounts of energy and move in specific orbits around the nucleus, like planets orbiting the sun. 

• J.J. Thomson
• Ernest Rutherford
• Niels Bohr
• James Chadwick

According to Ernest Rutherford, an atom is made of mostly....

• empty space
• electrons
• the nucleus
• protons

Who discovered the electron?

• Bohr

• Dalton

• Rutherford

• Thompson

In Rutherford's famous "Gold Foil" experiment, some particles passed through the foil, some were deflected, and some were bounced straight back. This observation made Rutherford conclude

• gold atoms have a solid nucleus

• gold atoms can conduct electricity

• gold atoms are denser than other metals

• gold's elections orbit the nucleus at definite distances from the center

In Thomson's plum pudding model, the plums represent

• protons

• neutrons

• the nucleus

• electrons