SCIENCE REVIEWER

What is matter composed of

• Energy and light
• Atoms and molecules
• Cells and tissues
• Waves and particles

Tags

NGSS.MS-PS1-1

TYPE THE ELECTRON CONFIGURATION (Ex:1s^2 2s^2)

Tags

NGSS.HS-PS1-1

TYPE THE ELECTRON CONFIGURATION (Ex:1s^2 2s^2)

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

TYPE THE ELECTRON CONFIGURATION (Ex:1s^2 2s^2)

Tags

NGSS.HS-PS1-1

What is the smallest unit of a chemical element?

• Molecule

• Atom

• Compound

• Cell

Tags

NGSS.HS-PS1-7

Who was the first person to propose the idea of atoms?

• Democritus
• John Dalton

• Isaac Newton
• Aristotle

what did the gold foil experiment find?

• Atoms are made entirely of empty space.
• The gold foil experiment proved that electrons are located in the nucleus.
• The experiment showed that all atoms are identical in structure.
• The gold foil experiment found that atoms have a small, dense nucleus.

What experiment introduced the idea of electrons?

• Faraday's electrolysis experiment
• J.J. Thomson's cathode ray tube experiment
• Rutherford's gold foil experiment
• Millikan's oil drop experiment

Name 3 different atomic models

What does the AUFBAU principle state?

• Electrons fill orbitals starting from the lowest energy level to the highest.
• Electrons fill all orbitals of the same energy level before moving to the next.
• Electrons fill orbitals randomly without any order.
• Electrons only occupy the highest energy orbitals first.