Matter and Periodic Table

How many groups (columns) are there in the periodic table?

• 7

• 12

• 18

• 20

Which side of the staircase on the periodic table contains metals?

• Left

• Right

• Top

• Bottom

Explain how the periodic table is organized and why this organization is important for understanding element properties.

• It is organized by alphabetical order, which helps find elements quickly.

• It is organized by atomic number and properties, which helps predict element behavior and relationships.

• It is organized by color, which shows element reactivity.

• It is organized by atomic mass only, which helps identify isotopes.

If an element is found on the zigzag staircase of the periodic table, what type of element is it most likely to be?

• Metal

• Non-metal

• Metalloid

• Noble gas

Which of the following is an example of a metalloid?

• Oxygen

• Copper

• Boron

• Gold

What is a chemical family?

• A group of elements with different properties

• A row of elements with similar properties

• A group (column) with similar properties

• A mixture of metals and non-metals

Why are alkali metals stored in mineral oil?

• To make them shiny

• To prevent reaction with water vapor

• To increase their conductivity

• To make them less reactive

Compare the reactivity of alkali metals and alkaline earth metals. Which statement is correct?

• Alkali metals are less reactive than alkaline earth metals.

• Both groups have the same reactivity.

• Alkali metals are more reactive than alkaline earth metals.

• Alkaline earth metals are the most reactive metals.

Strategically, why does the reactivity of alkali metals increase as you go down the group?

• The atoms get smaller and hold electrons more tightly.

• The atoms get larger and the outer electron is farther from the nucleus, making it easier to lose.

• The number of valence electrons increases.

• The metals become less shiny.

Matter is defined as anything that has:

• Color and shape

• Mass and volume

• Energy and force

• Atoms and molecules