What is the formula of the compound formed from the ions of calcium and bromine?
a. CaBr3
b. CaBr
c. CaBr2
d. Ca2Br3
e. None of these
[Ques. 2] The element that is most abundant in Earth's crust is
a. silicon.
b. iron.
c. oxygen.
d. nitrogen.
[Ques. 3] What is the formula of the compound formed from the ions of aluminum and oxygen?
a. Al2O3
b. AlO
c. AlO3
d. None of these
[Ques. 4] Any naturally occurring, inorganic, crystalline substance with a fairly definite chemical composition is called a(n)
a. element.
b. compound.
c. rock.
d. mineral.
[Ques. 5] What is the formula of a compound formed from the ions M1+ and X1-?
a. M2X
b. MX
c. M2X2
d. MX2
[Ques. 6] The study of minerals is called
a. paleontology.
b. geology.
c. mineralogy.
d. petrology.
[Ques. 7] What is the formula of a compound formed from the ions M2+ and X3-?
a. MX
b. M3X2
c. M2X3
d. M6X6
[Ques. 8] About what percent of Earth's surface is covered by land?
a. 70
b. 10
c. 50
d. 30
[Ques. 9] What is the formula of a compound formed from the ions M3+ and X1-?
a. M3X
b. MX
c. M2X3
d. MX3
[Ques. 10] The study of planet Earth is known as
a. mineralogy.
b. petrology.
c. geology.
d. paleontology.
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