PS M17 Reading Questions

Which of the following is an example of a metal object you might be wearing?

• A ring

• A scarf

• A plastic watch

• A cotton shirt

THINK IT OVER: Metal sheets and wires are used for which of the following purposes?

• Building structures and electrical wiring

• Cooking food and growing plants

• Writing books and painting pictures

• Making perfumes and cleaning floors

Metals conduct electricity because:

• they have free electrons that move easily.

• they are hard and shiny.

• they have high melting points.

• they are good insulators.

Tags

NGSS.MS-PS1-2

Knowledge of the properties of alkali metals is used to predict how they will react and how they should be stored because:

• They are highly reactive and must be stored under oil to prevent reaction with air or water.

• They are non-reactive and can be stored in open containers.

• They react only with acids and do not need special storage.

• They are stable in air and water and require no precautions.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Interactions of electric charges at the atomic scale explain the reactivity of alkali metals because:

• Alkali metals have a single valence electron that is easily lost due to weak attraction from the nucleus.

• Alkali metals have a full outer shell, making them stable and unreactive.

• Alkali metals gain electrons easily due to strong nuclear attraction.

• Alkali metals do not interact with other elements because of their neutral charge.

Tags

NGSS.MS-PS2-3

The location of alkali metals on the periodic table is related to the number of electrons in the outer electron energy level in which way?

• They have one electron in their outermost energy level.

• They have two electrons in their outermost energy level.

• They have a full outermost energy level.

• They have no electrons in their outermost energy level.

Alkali metals and alkaline earth metals can be compared and contrasted based on their chemical properties. Which of the following statements correctly describes a difference between them?

• Alkali metals are more reactive than alkaline earth metals.

• Alkali metals have higher melting points than alkaline earth metals.

• Alkali metals are found in nature as free elements, while alkaline earth metals are not.

• Alkali metals form compounds with a +2 charge, while alkaline earth metals form compounds with a +1 charge.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

How many elements are classified as alkaline earth metals?

• Six elements are classified as alkaline earth metals: Be, Mg, Ca, Sr, Ba, Ra.

• Four elements are classified as alkaline earth metals: Be, Mg, Ca, Sr.

• Eight elements are classified as alkaline earth metals: Be, Mg, Ca, Sr, Ba, Ra, Fr, Li.

• Five elements are classified as alkaline earth metals: Be, Mg, Ca, Sr, Ba.

Which of the following is NOT a transition element?

• Iron

• Cobalt

• Nickel

• Aluminum

Fill in the blank: The transition element that is used in making steel and in chrome plating is ________.

• chromium

• zinc

• copper

• nickel