Subatomic Particles and Atomic Structure

The video tutorial covers the basics of atomic structure, including the nucleus, protons, neutrons, and electrons. It explains the concepts of isotopes and ions, detailing the differences between cations and anions. The periodic table is discussed, highlighting its organization and the historical development by Mendeleev. The tutorial also covers how to calculate atomic mass based on percent abundance and concludes with labeling different groups on the periodic table.

What is the central part of an atom called?

• Nucleus

• Neutron

• Proton

• Electron cloud

Which subatomic particle is positively charged?

• Electron

• Neutron

• Nucleus

• Proton

What distinguishes isotopes of the same element?

• Number of neutrons

• Number of protons

• Number of electrons

• Atomic number

What is the charge of an anion?

• Neutral

• Positive

• Negative

• Variable

How is the mass number of an atom calculated?

• Protons + Electrons

• Neutrons + Electrons

• Protons + Neutrons

• Protons + Neutrons + Electrons

Why is the mass of electrons considered insignificant?

• They are not part of the atom

• Their mass is negligible compared to protons and neutrons

• They have no mass

• They are too small

If an atom has a charge of +2, what does it mean?

• It lost 2 protons

• It gained 2 protons

• It lost 2 electrons

• It gained 2 electrons

How many electrons does an oxygen ion with a -2 charge have?

• 10

• 8

• 6

• 12

What is the first step in calculating atomic weight based on isotopic abundance?

• Divide by total isotopes

• Multiply mass by percentage

• Add all isotopes

• Shift decimal two places back

Which group on the periodic table contains the noble gases?

• Transition metals

• Alkaline metals

• Noble gases

• Halogens