Atoms in Focus: Structure, Isotopes, and Electron Energy Levels

This video provides a comprehensive review of atomic structure, including the nucleus, protons, neutrons, and electrons. It explains the periodic table, focusing on atomic and mass numbers, and introduces isotopes, highlighting their stability and radioactive decay. The video also covers electron energy levels, detailing how electrons can become excited and move between shells. Finally, it discusses ionization, describing how atoms can become ions through energy absorption.

What is the charge of a neutron?

• Variable

• Negative

• Positive

• Neutral

How many times smaller is an electron compared to a proton?

• 2000 times

• 1000 times

• 500 times

• 100 times

What does the atomic number of an element represent?

• Number of neutrons

• Number of electrons

• Number of isotopes

• Number of protons

If an atom has 3 protons and 4 neutrons, what is its mass number?

• 3

• 4

• 7

• 12

What defines isotopes of the same element?

• Same number of protons

• Same mass number

• Same atomic mass

• Same number of neutrons

What is the process called when unstable isotopes emit radiation?

• Radioactive decay

• Ionization

• Electron excitation

• Nuclear fusion

What happens when an electron becomes 'excited'?

• It loses energy

• It becomes a proton

• It moves to a lower energy level

• It moves to a higher energy level

What is required for an electron to jump to a higher energy level?

• Gravitational pull

• Nuclear force

• Electromagnetic radiation

• Heat energy

What is formed when an atom loses an electron?

• A negative ion

• A neutral atom

• A neutron

• A positive ion

What does ionizing radiation do to atoms?

• Removes neutrons

• Changes atomic number

• Adds protons

• Knocks off electrons