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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

Click on the site (http://openstaxcollege.org/l/16PhetAtomMass) and select the 鈥淢ix Isotopes鈥� tab, hide the 鈥淧ercent Composition鈥� and 鈥淎verage Atomic Mass鈥� boxes, and then select the element boron.

(a) Write the symbols of the isotopes of boron that are shown as naturally occurring in significant amounts.

(b) Predict the relative amounts (percentages) of these boron isotopes found in nature. Explain the reasoning behind your choice.

(c) Add isotopes to the black box to make a mixture that matches your prediction in (b). You may drag isotopes fromtheir bins or click on 鈥淢ore鈥� and then move the sliders to the appropriate amounts.

(d) Reveal the 鈥淧ercent Composition鈥� and 鈥淎verage Atomic Mass鈥� boxes. How well does your mixture match withyour prediction? If necessary, adjust the isotope amounts to match your prediction.

(e) Select 鈥淣ature鈥檚鈥� mix of isotopes and compare it to your prediction. How well does your prediction comparewith the naturally occurring mixture? Explain. If necessary, adjust your amounts to make them match 鈥淣ature鈥檚鈥漚mounts as closely as possible.

Determine the empirical formula for the following compounds:

a) caffeine, C6H10N4O2

b) fructose, C12H22O11

c) hydrogen peroxide, H2O2

d) glucose, C6H12O6

e) ascorbic acid (vitamin C), C6H8O6

Each of the following compounds contains a metal that can exhibit more than one ionic charge. Name these compounds:

a. Cr2O3

b. FeCl2

c. CrO3

d. TiCl4

e.CoO

f. MoS2

For each of the following compounds, state whether it is ionic or covalent. If it is ionic, write the symbols for the ions involved:

  1. NF3
  2. BaO
  3. (NH4)2CO3
  4. Sr(H2PO4)2
  5. IBr
  6. Na2O

Question: Write the formulas of the following compounds:

(a) chlorine dioxide

(b) dinitrogen tetraoxide

(c) potassium phosphide

(d) silver(I) sulfide

(e) aluminum nitride

(f) silicon dioxide
See all solutions

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