(Chem) W7 Unit 2 Atoms Test

In Science, matter refers to a substance that has _____ and occupies space. 

• mass
• time
• purpose
• solids

Tags

NGSS.MS-PS1-5

The ______ theory explains that matter is composed of tiny units known as atoms.

• atomic
• kinetic
• gravitational
• industrial

Tags

NGSS.MS-PS1-1

Who was the Greek philosopher introduced the idea of the atom as the basic building block of matter? He gave them the name atomos.

• Democritus
• Aristotle
• Thomson
• Dalton

______ did not believe in the atomic theory. He thought that all materials on Earth were not made of atoms, but of the four elements, Earth, Fire, Water, and Air.

• Aristotle
• Democritus
• Thomson
• Rutherford

Around 1800, the English chemist John _____ brought back Democritus’ ancient idea of the atom.

• Dalton
• Thomson
• Jacobs
• Rutherford

In Dalton's theory he said,  atoms are the _____ particles of matter. They cannot be divided into smaller particles. They cannot be created, or destroyed.

• smallest
• fake
• main
• largest

Dalton also said in his theory that all atoms of the same element are alike and have the same _______.

• mass
• odor
• color
• shape

Tags

NGSS.MS-PS1-5

It wasn’t until _____ that a scientist named Joseph John (J. J.) Thomson discovered that there are smaller particles within the atom.

• 1897

• 1987

• 1798

• 1812

Tags

NGSS.MS-PS1-1

Thomson called the particles he discovered  “_______,” but they were later renamed electrons.

• corpuscles
• protons
• neutrons
• quarks

Ernest _______ was a student of JJ Thomson. He aimed a beam of alpha particles (radioactive) at a sheet of very thin gold foil.

• Rutherford
• Thomson
• Bohr
• Edison