Review For Midterm

Elements in a group of the periodic table are described below. Properties of a Certain Group of Elements

• Soft silvery-white color

• Good conductor of thermal energy

• Good conductor of electricity

• Atoms contain a single valence electron

These elements most likely belong to which group?

• A. Alkali metals

• B. Alkaline earth metals

• C. Halogens

• D. Noble gases

The elements that are characterized by the presence of an incomplete d sublevel are called ____________.

• A. halogens

• B. alkali earth metals

• C. transition elements

• D. lanthanoids

Which of the following elements are in the same group?

• A. He, Ne, Cl, Br

• B. Co, Ni, Cu, Zn

• C. K, Zr, Rb, O

• D. H, Li, Na, K

Heart cells require a certain balance of sodium and potassium ions to function. The blood, which is approximately 83% water, carries these two types of ions to the heart. The property of water that allows it to carry ions to the heart is its __________________.

• A. molecular mass

• B. specific heat

• C. polarity

• D. density

Surface tension is ____________________________.

• A. skin on the surface of the liquid

• B. the tendency of the surface of the liquids to decrease the area

• C. the spontaneous mixing of two substances

• D. the same as vapor pressure

This cannot be broken down by chemical or physical means.

• A. substance

• B. compound

• C. mixture

• D. element

Sodium, mercury, argon, and neon are used in the production of lamps. There are fewer safety guidelines regarding the handling of neon and argon than for mercury and sodium. Which of the following best describes the elements within the group of the periodic table that contains neon and argon gas?

• A. Gaseous at room temperature and highly reactive with metals

• B. Solid at room temperature and mildly reactive with strong acids

• C. Gaseous at room temperature and mostly unreactive with metals

• D. Solid at room temperature and mostly unreactive with strong acids

A scientist is trying to find a metal that can be used to create a new type of conductor. This scientist works with the elements listed below in the laboratory. Which element would have the properties of metals the scientist needs?

• A. nitrogen

• B. chlorine

• C. scandium

• D. iodine

If I put gas in a smaller container, the pressure will ______________.

• A. Decrease

• B. Increase

• C. Stay the same