The video tutorial by Miss Schuler covers the structure of an atom, starting with a historical perspective on the concept of atoms introduced by Democritus. It compares the size of atoms and cells, explaining that atoms are the building blocks of cells. The tutorial delves into subatomic particles—protons, neutrons, and electrons—describing their charges and masses. It explains the structure of atoms, highlighting the nucleus and electron cloud. Finally, it discusses atomic numbers and mass numbers, emphasizing their role in differentiating elements.

Who was the first Greek philosopher to propose the idea of an atom?

• Socrates

• Democritus

• Plato

• Aristotle

What is smaller, an atom or a cell?

• It depends on the type of cell

• Both are the same size

• An atom

• A cell

Tags

NGSS.MS-PS1-1

Which subatomic particle has a positive charge?

• Electron

• Neutron

• Photon

• Proton

What is the relative charge of a neutron?

• -1

• +2

• 0

• +1

How does the mass of an electron compare to that of a proton?

• It is slightly less

• It is significantly less

• It is slightly more

• It is the same

What did Rutherford's gold foil experiment demonstrate about the structure of an atom?

• Atoms are mostly empty space

• Atoms are solid throughout

• Electrons are in the nucleus

• Protons are on the outside of the atom

Where are protons and neutrons located in an atom?

• In the nucleus

• Orbiting the nucleus

• In the electron cloud

• In the outer shell

What determines the different properties of elements?

• Number of electrons

• Number of neutrons

• Number of protons

• Number of atoms

What is the atomic number of an element?

• The sum of protons and neutrons

• The number of neutrons

• The number of protons

• The number of electrons

How do you calculate the number of neutrons in an atom?

• Atomic number minus mass number

• Mass number minus atomic number

• Number of protons plus electrons

• Number of electrons minus protons