Democritus, Dalton, and Atomic Theory

Who lived from 460-370 BC and was among the first to suggest the idea of the atom?

• Atomos
• Dalton
• Democritus
• Aristotle

Which of the following was NOT among Democritus's ideas?

• Matter consists of tiny particles called atoms.
• Atoms are indivisible.
• Atoms retain their identity in a chemical reaction.
• Atoms are indestructible.

Tags

NGSS.HS-PS1-7

Which of the following is NOT a part of Dalton's atomic theory?

• All elements are composed of atoms.
• Atoms are alwyas in motion.
• Atoms of the same element are always identical.
• Atoms that combine do so in simple, whole-number ratios.

Dalton's theory included which idea?

• All atoms of all elements are the same size.
• Atoms of different elements always combine in one-to-one ratios.
• Atoms of the same element are always identical.
• Individual atoms can be seen with a microscope.

The comparison of the number of atoms in a copper penny with the number of people on Earth is made to illustrate which of the following?

• that atoms are indivisible
• that atoms are extremely small
• that the universe is extremely large
• that there are enough pennies for every person on Earth