Historical Timeline of Atom

What are neutral atoms?

• Neutral atoms have more protons than electrons

• Neutral atoms have equal numbers of protons and electrons

• Neutral atoms loses electrons

• Neutral atoms gains electrons

Tags

NGSS.HS-PS1-7

Who discovered the negatively charged particle in an atom?

• Ernest Rutherford

• Neils Bohr

• John Dalton

• Sir Joseph John Thomson

Analogy
John Dalton: Billiard Ball Model
: Atomic Planetary Model

• Sir Joseph John Thomson

• Neils Bohr

• Erwin Schrodinger

• Ernest Rutherford

What is the smallest unit that makes up matter?

• Atom

• Cell

• Unit

• molecules

Tags

NGSS.MS-PS1-1

Which of the following statements is not included in the Atomic Theory of John Dalton?

• All matter is composed of extremely small particles called atoms.

• Atoms cannot be subdivided, created, or destroyed.

• Atoms of different elements can combine in simple whole number ratios to form chemical compounds.

• Atoms of same element differ in size, mass, and other properties.

Tags

NGSS.HS-PS1-7

What are the 3 major subatomic particles of atom?

• electron

• proton

• neutron

• molecule

• element

Tags

NGSS.HS-PS1-8

Who discovered the uncharged subatomic particle inside an atom?

• James Chadwick

• Ernest Rutherford

• Erwin Schrodinger

• Neils Bohr

Which if the following is the Nuclear Model of an atom?

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• 
• 
• 

Tags

NGSS.HS-PS1-8

Which if the following is Atomic planetary Model of an atom?

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• 
• 
• 

Who was the first person to conduct experiment proving the existence of atom?

• John Dalton

• Ernest Rutherford

• Erwin Schrodinger

• Sir J.J Thomson