Science 7.1

Who proposed matter is made of small, invisible objects called atoms?

• Democritus
• Aristotle
• Plato
• Socrates

Who's atomic theory stated that atoms cannot be divided, created, or destroyed?

• Democritus

• Bohr

• Thomson

• Dalton

What did Thomson discover?

• electron
• neutron
• proton
• photon

Who's atomic model stated that atom is a positively charged sphere with negative charged electrons throughout it?

• Thomson

• Newton

• Bohr

• ERutherford

Atoms were first seen by using what?

• scanning tunneling microscope (STM)
• electron microscope
• telescope
• magnifying glass

What did Rutherford discover?

• Electrons and electron cloud.
• Protons and neutron.
• Atomic nucleus and nuclear model of the atom.
• The structure of the atom.

Tags

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Who discovered neutrons?

• James Chadwick
• Albert Einstein
• Isaac Newton
• Marie Curie

What is electron cloud?

• The electron cloud is the region around an atomic nucleus where electrons are likely to be found.
• The electron cloud is a fictional concept used in science fiction movies.
• The electron cloud is a term used to describe the movement of electrons in a computer network.
• The electron cloud is a type of weather phenomenon that occurs in the atmosphere.

Tags

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Protons and neutrons are made of smaller parts called what?

• Electrons
• Molecules
• Quarks
• Atoms

How many types of quarks are there?

• There are eight types of quarks.
• There are four types of quarks.
• There are six types of quarks.
• There are two types of quarks.