Periodic Table Basics

What does the atomic number of an element represent?

• The number of protons in the nucleus

• The number of neutrons in the nucleus

• The total number of protons and neutrons in the nucleus

• The total number of electrons orbiting the nucleus

Which symbol represents the element Oxygen?

• O

• Ox

• Om

• Og

Which of the following chemical families contains Helium (He)?

• Alkali metals

• Noble gases

• Halogens

• Transition metals

Which property is generally associated with metals?

• Poor conductivity of heat and electricity

• High reactivity with water

• Malleability and ductility

• Low melting and boiling points

Which of the following is a property of non-metals?

• High density

• High thermal and electrical conductivity

• Ability to form cations easily

• Brittle in solid state

What is the atomic number of Carbon?

• 6

• 12

• 14

• 8

Which group in the periodic table is known for having a full outer electron shell?

• Alkali metals

• Alkaline earth metals

• Halogens

• Noble gases

Which of the following elements is a metalloid?

• Boron (B)

• Calcium (Ca)

• Nitrogen (N)

• Iron (Fe)

What is the main characteristic of transition metals compared to other elements?

• They are gases at room temperature.

• They have low reactivity.

• They can form compounds with variable oxidation states.

• They are poor conductors of electricity.

Which of the following is a characteristic property of alkali metals?

• They are noble gases.

• They have very low reactivity.

• They are highly reactive, especially with water.

• They are good insulators of heat and electricity.