Chemistry: Precision and Design - Quiz 4 (Sections 2.3-2.4)

During a science fair, Lily set up an experiment where she shot tiny balls at a thin sheet of gold foil, expecting them to pass straight through. What unexpected observation did Lily make that led her to question the existing model of the atom?

• The foil allowed the balls to pass through.

• The foil absorbed the balls.

• The foil reflected some balls back.

• The foil neutralized the balls.

Tags

NGSS.MS-PS2-1

During a science experiment, Nora is asked to identify which subatomic particle has zero electrical charge. Which of the following should she choose?

• nucleon

• proton

• neutron

• electron

Mia is learning about the particles that make up atoms. She wants to know: Which of the following subatomic particles is the lightest?

• nucleon

• proton

• neutron

• electron

William is studying two samples of the same element, but he notices that the atoms in each sample have different mass numbers. What are atoms of the same element that differ in their mass numbers?

• isotopes

• ions

• nucleons

• quarks

Emma is studying chemistry and wants to know what the name is for the number of protons in an atom. What is it called?

• mass number

• atomic number

• nucleon number

• subatomic number

Jackson is studying the atomic structure of elements in his chemistry class. He comes across a neutral atom of sulfur that has 16 protons and 18 neutrons. Which of the following is the correct atomic symbol for this atom?

• 16/34 S

• 16/18 S

• 18/16 S

• 34/16 S

Tags

NGSS.MS-PS1-1

Kai is studying the properties of iron ions in his chemistry class. He comes across a sample labeled 56/26 Fe3+. How many electrons are in this ion?

• 23

• 26

• 29

• 56

Match the following

• Robert Millikan

• determined the mass of a neutron

• Ernest Rutherford

• conducted the oil-drop experiment

• James Chadwick

• proposed the atomic theory in 1803

• John Dalton

• proposed the planetary model of the atom

• J. J. Thomson

• electron discovered from cathode rays

Match the following subatomic particles with their charges.

• Negative charge

• Made of one atom

• No charge

• Electrons

• Element

• The center of an atom

• Nucleus

• Neutrons

• Positive charge

• Protons