Entrance Ticket to Lab: 3.1 Conservation of Mass

In a reaction A + B ----> AB,  reactant A has 4g and product  AB has 10g. How many grams does reactant B should have? 

• 4g
• 5g
• 6g
• 14g

Tags

NGSS.MS-PS1-5

Who stated that atoms cannot be divided?

• Democritus
• Dalton
• Thomson
• Bohr

What scientist is best known for his "Plum Pudding" model of the atom?

• J.J. Thomson
• Ernest Rutherford
• John Dalton
• Democritus

Tags

NGSS.MS-PS1-1

Rutherford's gold foil experiment provided evidence that...

• negative and positive charges are spread evenly throughout the atom.
• alpha particles have a positive charge.
• gold is not a dense as previously thought.
• there is a dense positively charged nucleus at the center of an atom.

Tags

NGSS.MS-PS1-1

Who discovered the nucleus using the gold foil experiment?

• Democritus
• Robert Millikan
• James Chadwick
• Ernest Rutherford

He discovered the electron using cathode ray tube experiment.

• Joseph Thomson
• John Dalton
• Ernest Rutherford
• Robert Millikan

_{What is in the nucleus of an atom?}

• Neutrons and protons 
• Protons
• Protons and Electrons
• Electrons and Nuetrons

Tags

NGSS.MS-PS1-1

The particles with no charge in an atom are the _______.

• electrons
• neutrons
• protons
• protons and neutrons

Tags

NGSS.MS-PS1-1

What is an isotope? 

• A charged atom
• An atom with different amounts of neutrons
• An atom with different amounts of protons
• A neutral atom

Tags

NGSS.MS-PS1-1

What does this image represent?

• Dalton's Billiard Ball Model

• Thomson's Plum Pudding

• Rutherford's Gold Foil

• Bohr's Planetary Model