Atomic Structure

Who was the first to name the atom?

• Democritus

• John Dalton

• Dmitri Mendeleev

• Ernest Rutherford

According to John Dalton's Solid Sphere model, what is an atom?

• A solid sphere that can't get any smaller

• A positively charged sphere with negative particles embedded throughout

• A dense center made of protons and neutrons

• A negatively charged particle outside of the nucleus

Who developed the first periodic table of elements?

• Democritus

• John Dalton

• Dmitri Mendeleev

• Ernest Rutherford

According to JJ Thomson's Plum Pudding Model, what is the atom?

• A solid sphere that can't get any smaller

• A positively charged sphere with negative particles embedded throughout

• A dense center made of protons and neutrons

• A negatively charged particle outside of the nucleus

What did Ernest Rutherford's Gold foil experiment reveal about the atom?

• The atom is divisible

• The mass of the atom and its positively charged particles were in the nucleus

• The number of protons is unique to each element

• Electrons are negative particles that travel in fixed orbits

Tags

NGSS.HS-PS1-8

According to Niels Bohr's Bohr Model, where do electrons travel?

• In fixed orbits around the positively charged nucleus

• In the electron cloud surrounding the nucleus

• In shells or energy levels

• In the outermost energy level

What did Schrodinger and Heisenberg's Electron Cloud model propose about electrons?

• They travel in fixed orbits

• They are negative particles

• They are divided into shells

• They do not travel in fixed orbits

What is an atom?

• the smallest particle of an element

• a solid

• the largest particle of an element

• wrong

Tags

NGSS.MS-PS1-1

Categorize the following as parts of the "Nucleus" or "Electron Cloud"

Groups:

(a) Nucleus

,

(b) Electron cloud

• Where the mass of the atom is located

• Where the volume of the atom is located

• Dense center

• Broken down into regions of space called "shells" or energy levels"

• Made of protons and neutrons

• Space surrounding the nucleus

• Negatively charged

• Positively charged

Tags

NGSS.HS-PS1-8

Match the following subatomic particles to their abbreviations:

• n0

• Proton

• e-

• Electron

• p+

• Neutron