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100

Which element is classified as a metalloid?
a. boron
b. potassium
c. sulfur
d. xenon

a. boron

100

Why is sulfur classified as a Group 16 element?

A sulfur atom has 6 valence electrons

100

At STP, which physical property of aluminum always remains the same from sample to sample?

density

100

A statement that describes a property of hydrogen gas is...

A statement that describes a property of hydrogen gas is...

100

What are two terms that represent two types of chemical formulas?

molecular and structural

200

Which lit of elements consists of a metal, metalloid, and a non-metal?
a. Li, Na, Rb
b. Cr, Mo, W
c. Sn, Si, C
d. O, S, Te

c. Sn, Si, C

200

Which sample of matter has the greatest distance between molecules at STP?
a. N2(g)
b. NH3(aq)
c.C6H14(l)
d. C6H12O6(s)

a. N2(g)

200

Which sample of CO2 has a definite shape and volume?


CO2(s)

200

Which element is liquid at 1000. K?
a. Ag
b. Al
c. Ca
d. Ni

b. Al


200

Every water molecule has two hydrogen atoms bonded to one oxygen atom. This fact supports the concept that elements in a compound are

chemically combined in proportion that vary

300

Which list includes elements with the most similar chemical properties?
a. Br, Ga, Hg
b. Cr, Pb, Xe
c. O, S, Se
d. N, O, F

c. O, S, Se



300

At STP, a 50. - gram sample of H2O (l) and a 100. - gram sample of H2O(l) have...

the same chemical properties

300

Which statement describes a chemical property of aluminum?

Aluminum reacts with sulfuric acid

300

Which elements has the highest melting point?
a. tantalum
b. rhenium
c. osmium
d. hafnium

b. rhenium

300

Which formula represents a mixture?
a. NaCl (aq)
b. NaCl (s)
c. H2O (l)
d. H2O (s)

a. NaCl (aq)

400

What quantity identifies an elements?

atomic number

400

The arrangement of particles is most ordered in a sample of
a. NaCl (aq)
b. NaCl (l)
c. NaCl (g)
d. NaCl (s)

d. NaCl (s)



400

Particles are arranged in a crystal structure in a sample of
a. H2(g)
b. Br2(l)
c. Ar(g)
d. Ag(s)

d.Ag(s)

400

Which substance can not be broken down by a chemical change?
a. methane
b. propanal
c. tungsten
d. water

c. tungsten

400

Which represents a homogenous mixture?
a.CuSO4(s)
b.Br2(l)
c. NaCl(aq)
d.CO2(g)

c. NaCl(aq)

500

The elements in the Periodic Table are arranged in order of increasing.....

atomic number

500

At-1 atm, equal masses of H2O(s), H2O(l), and H2O (g) have...

different volumes

500

Which substance can be decomposed by chemical means?
a. aluminum
b. octane
c. silicon
d. xenon

octane

500

Why is NaBr classified as a compound?

Na and Br are chemically combines in a fixed proportion.  

500

What type of matter is composed of two or more elements that are chemically combined in a fixed proportion?

compound

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