Introduction to Atoms

What is the basic unit of matter that makes up all substances?

• Molecule

• Atom

• Cell

• Compound

Tags

NGSS.MS-PS1-1

The atom is the basic building block of all ____.

• Energy

• Matter

• Light

• Sound

Tags

NGSS.MS-PS1-1

Elements are made up of only one type of ______.

• Molecule

• Atom

• Compound

• Mixture

What did Dalton's theory state about atoms?

• They are the largest particles of matter.

• They are the smallest particles of matter.

• They are liquid spheres.

• They are gaseous spheres.

Tags

NGSS.MS-PS1-5

What did Thomson's theory state about the structure of an atom?

• Atoms have electrons placed randomly within a 'soup' of positive charges.

• Atoms have a nucleus with orbiting electrons.

• Atoms are indivisible particles.

• Atoms are made of protons and neutrons.

According to Rutherford's theory, electrons orbit the nucleus like ______ around the sun.

• stars

• planets

• comets

• asteroids

What is the charge of the nucleus according to Rutherford's theory?

• Negative

• Neutral

• Positive

• No charge

According to Bohr's Theory, electrons move within ______ orbits around the nucleus.

• random

• fixed

• elliptical

• spiral

In what year was Bohr's Theory proposed?

• 1905

• 1913

• 1920

• 1935

Bohr's Theory suggests that electrons move around the nucleus in what manner?

• Randomly

• In fixed orbits

• In a straight line

• In a zigzag pattern