Exploring Chemical Families and Periodic Trends

Who designed the first widely accepted periodic table?

• Marie Curie

• Dmitri Mendeleev

• Isaac Newton

• Albert Einstein

What key discovery did Henry Moseley make that impacted the periodic table?

• Discovery of the neutron

• Discovery of the electron

• Discovery of the atomic number

• Discovery of radioactivity

What does the periodic law state?

• Elements are organized by increasing atomic mass

• Elements are organized by their isotopes

• Elements are randomly organized

• Elements are organized by increasing atomic number, showing periodic patterns

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which category do elements that are shiny and conduct electricity belong to?

• Non-metals

• Metalloids

• Metals

• Noble gases

What is the term for elements that have properties of both metals and non-metals?

• Isotopes

• Alloys

• Metalloids

• Compounds

Which family of elements is known for being highly reactive and found on the far right of the periodic table?

• Alkali metals

• Transition metals

• Halogens

• Noble gases

Which element is liquid at room temperature?

• Gold

• Mercury

• Iron

• Copper

Tags

NGSS.MS-PS1-4

What trend describes the decrease in atomic size as you move from left to right across a period?

• Metallic character decrease

• Atomic radius decrease

• Electronegativity increase

• Ionization energy increase

Which element has the highest electronegativity?

• Nitrogen

• Hydrogen

• Fluorine

• Oxygen

Tags

NGSS.HS-PS1-2

What property is defined as the distance between two bonding nuclei?

• Atomic radius

• Ionization energy

• Electronegativity

• Valence level