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?:

Question

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.