C03.5a Atomic Theory Lecture

Multiple Choice

Multiple Choice

Which one is part of the MODERN atomic theory but NOT part of DALTON's atomic theory?

• all matter is composed of atoms

• atoms of the same element are identical

• an element is made up of atoms with different masses

Open Ended

In other words, why did the stream of electrons bend away from the negative charge plate?

Open Ended

In other words, why did the stream of particles move the paddle wheel?

Multiple Choice

The cathode ray tube experiment and the discovery of the electron disproved which atomic model?

• 
  Dalton's Billiard Ball model

• Thomson's Plum Pudding model

• Rutherford's Nuclear model

Multiple Choice

The gold foil experiment led to the discovery of

• the nucleus

• the electron

• the neutron

• the proton

• atoms

Multiple Choice

What is the unknown element?

• beryllium

• copper

• manganese

• strontium

• titanium

Multiple Choice

Which of these can be used like a fingerprint to identify an unknown element?

• Chat gpt

• emission line spectrum

• cathode ray tube

• Bohr model

• periodic table

Multiple Choice

What is true about the number of electrons and protons in an atom?

• the number of electrons is equal to the number of protons

• there are more protons in an atom

• there are more electrons in an atom

​Self Pace Mode Activate

Use your notes to answer the following questions.

Multiple Choice

This contains most of the mass of an atom

• Electron Cloud
• Nucleus
• Electron

Multiple Choice

An atom's overall charge is ________.

• positive 
• depends
• neutral 
• negative 

Multiple Choice

–Each element consists of tiny invisible particles called atoms

–All atoms of the same element are identical in size, mass, and properties (not quite) but atoms of different elements are different in size, mass, and properties.

–Atoms cannot be subdivided, created, nor destroyed (not quite).

–Atoms of different elements combine in simple, whole-number ratios to form compounds.

–In chemical reactions, atoms are combine, separated, or rearranged.

• Dalton's Atomic Theory

• Democritus Atomic Theory

• Quantum Mechanical Atomic Theory

• Modern Atomic Theory

Match

Match the following

oil drop experiment

cathode ray tube

Gold Foil Experiment

Emission Line Spectrum

• oil drop experiment

• cathode ray tube

• Gold Foil Experiment

• Emission Line Spectrum

Multiple Choice

What model of the atom?

• Quantum model

• planetary/ nuclear model

• plum pudding model

• Bohr model

• De Broglie model

Multiple Choice

• Quantum model

• planetary/nuclear model

• plum pudding model

• Bohr model

• De Broglie model

Multiple Choice

Smallest particle of an element that still maintains the properties of that element.

• atom

• compound

• element

• molecule

• isotope

Multiple Choice

The beam of electrons was deflected away from the negative charge plate proved that

• electrons are a fundamental particle (found in all matter)

• electrons have mass

• electrons are positively charged

• electrons behave like a wave

• electrons are negatively charged

Multiple Choice

What actually happened to the alpha particles in the gold foil experiment?

• half to be deflected and half to pass straight through the gold foil

• all of the alpha particles to pass straight through the gold foil

• all of the alpha particles to bounce back from the gold foil

• most to pass straight through, some deflected at a small angle, and a few to bounce almost straight back

Labelling

Label the atom

Drag labels to their correct position on the image

neutron

proton

electron

Multiple Choice

The unknown emissions spectra belongs to the element

• Hydrogen

• Mercury

• Neon

• Sodium