Challney yr 9 model of the Atom PBD

What did Rutherford's discovery of the nuclear atom imply about the understanding of atomic structure?

• Atoms are solid and impenetrable
• Atoms have a small, positively-charged nucleus surrounded by empty space
• Atoms are made up of negative charges
• Atoms have a small, negatively-charged nucleus surrounded by empty space

What were the four elements believed to make up matter in ancient Greece?

• earth, wind, fire, water
• earth, air, water, metal
• earth, air, fire, wind
• earth, air, fire, water

What did J J Thomson's plum pudding model propose?

• atoms consist of two types of static electricity
• atoms are solid throughout
• atoms are made up of positive dough and negative electrons
• atoms can be squashed

Why was it significant to use a vacuum in the experiment?

• To increase the speed of alpha particles
• To reduce the thickness of gold foil
• To prevent deflections of alpha particles
• To create a controlled environment

What did Rutherford conclude based on the observation that a small number of alpha particles were deflected at large angles?

• There is an equal distribution of positive and negative charges in the atom
• There is a concentration of negative charge in the atom
• There is a concentration of positive charge in the atom
• There is no charge present in the atom

What was the purpose of the experiment conducted by Ernest Rutherford?

• To measure the thickness of gold foil
• To study the behavior of alpha particles
• To test the plum pudding model
• To observe the effects of vacuum

What is the significance of the observation that most alpha particles went straight through the foil?

• It suggests that the atom is made up of negative charges
• It suggests that the atom is made up of positive charges
• It suggests that the atom is mostly empty space
• It suggests that the atom is solid and impenetrable

What does the term 'atomos' mean?

• invisible
• expanding
• indestructible
• uncuttable

What is the relationship between positive charges and the deflection of alpha particles?

• Positive charges attract alpha particles
• Positive charges repel alpha particles
• Positive charges have no effect on alpha particles
• Positive charges absorb alpha particles

What evidence supported Thomson's plum pudding model?

• atoms consist of two types of static electricity
• atoms can be transferred as they collide
• solids cannot be squashed
• atoms are solid throughout