Question

6. The table shows the physical properties of an unknown substance after it was tested in a lab. What is the unknown substance most likely?:
Appearance | dull
Conductivity | none
Malleability | brittle
A. Metal
B. Metalloid
C. Alloy
D. Nonmetal
7. Paul made a list about alkaline earth metals. Paul made a mistake on his list. Which BEST describes the mistake Paul made?:
Alkaline Earth Metals:
gain two electrons
are found in group two
ions will be positive two
include elements Be, Mg, Ca
A. Alkaline earth metals are not found in group two; they are found in group one.
B. Alkaline earth metals do not include elements Be, Mg, and Ca; they include Co, Ni, and Cu.
C. Alkaline earth metal ions will not be positive two; the ions will be negative two.
D. Alkaline earth metals do not gain two electrons; they lose two electrons.

Answer 1

6. The unknown substance is most likely a **D. Nonmetal**. Nonmetals are typically dull in appearance, have poor conductivity, and are generally brittle.

7. The BEST description of the mistake Paul made is **D. Alkaline earth metals do not gain two electrons; they lose two electrons**. Alkaline earth metals are known to lose two electrons to form positive ions.