Lesson 2.1 Discovering Parts of an Atom

All matter is made of ___________.

• only protons

• only neutrons

• only electrons

• atoms

Tags

NGSS.MS-PS1-1

An atom is the smallest unit of a substance that still has properties of a substance.

• True

• False

Tags

NGSS.MS-PS1-1

Which person in history believed that matter was made of earth, fire, water, and air?

• Aristotle

• Beethoven

• Chadwick

• Dalton

Which person in history stated that atoms of one element are identical to each other but different from atoms of other elements?

• Aristotle

• Beethoven

• Chadwick

• Dalton

The first element on the PERIODIC TABLE of ELEMENTS is...

• Hydrogen

• Helium

• Water

• Hydrochloric Acid

True/False: All matter are made of only 4 elements: earth, air, fire, and water

• True

• False

True/False: Atoms are so small that trillions of atoms can fit in the period at the end of this sentence.

• True

• False

Tags

NGSS.MS-PS1-1

This tool enabled scientists to see tiny atoms.

• Scanning Tunnel Microscope

• Scanning Tunnel Telescope

• Scanning Tunnel Binocular

• None of the above

Who came up with the word atomos, which the English word atom came from?

• Aristotle

• Democritus

• Einstein

• Dalton

What is an atom mostly made of?

• air

• empty space

• neutrons

• protons

Tags

NGSS.MS-PS1-1