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Chapter 2: Q39E (page 123)

Using the periodic table, identify the lightest member of each of the following groups:

(a) noble gases

(b) alkaline earth metals

(c) alkali metals

(d) chalcogens

Short Answer

Expert verified

a. Helium

b. Beryllium

c. Lithium

d. Oxygens

Step by step solution

01

Determine the lightest member of noble gases.

Using the periodic table, we can say that the lightest member of noble gases is helium.

02

Determine the lightest member of alkaline earth elements

Using the periodic table, we can say that the lightest member of alkaline earth elements is beryllium.

03

Determine the lightest member of alkali metals.

Using the periodic table, we can say that the lightest member of alkali metals is lithium.

04

Determine the lightest member of chalcogens.

Using the periodic table, we can say that the lightest member of chalcogens is oxygen.

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Most popular questions from this chapter

Variations in average atomic mass may be observed for elements obtained from different sources. Lithium provides an example of this. The isotopic composition of lithium from naturally occurring minerals is 7.5% 6Li and 92.5% 7Li, which have masses of 6.01512 amu and 7.01600 amu, respectively. A commercial source of lithium, recycled from a military source, was 3.75% 6Li (and the rest 7Li). Calculate the average atomic mass values for each of these two sources.

Samples of compound X, Y, and Z are analyzed, with results shown here.

Do these data provide example(s) of the law of definite proportions, the law of multiple proportions, neither, or both? What do these data tell you about compounds X, Y, and Z?

The average atomic masses of some elements may vary, depending upon the sources of their ores. Naturally occurring, the boron consists of two isotopes with accurately known masses ( 10B, 10.0129 amu and 11B, 11.0931 amu). The actual atomic mass of boron can vary from 10.807 to 10.819, depending on whether the mineral source is from Turkey or the United States. Calculate the percent abundance leading to the two values of the average atomic masses of boron from these two countries.

What are the IUPAC names of the following compounds?

  1. Manganese dioxide
  2. Mercurous chloride (Hg2Cl2)
  3. Ferric nitrate [Fe(NO3)3]
  4. Titanium Tetrachloride
  5. Cupric bromide (CuBr2)

Question : Write the formulas of the following compounds:

(a) lithium carbonate

(b) sodium perchlorate

(c) barium hydroxide

(d) ammonium carbonate

(e) sulfuric acid

(f) calcium acetate

(g) magnesium phosphate

(h) sodium sulfite
See all solutions

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