Explanation:
A period 4 element is one of the chemical elements in the fourth row (or period) of the periodic table of the elements.
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Period 4 element.
Hydrogen Rubidium
Strontium
Yttrium
Zirconium
Niobium
Answer:
(b)liquid water is correct option . Because it is a molecular solid and molecular solid has weak interparticle forces of attraction.
Answer:
NaNH2, NH3
Explanation:
Choose the most appropriate reagent(s) for the conversion of propyne and 2-methyl-1-tosyloxy propane to 5-methyl-2-hexyne. NaNH2, NH3 NaOH, H2O KOCH2CH3, HOCH2CH3 H2SO4 NH3
answer is NaNH2, NH3
NaNH2, NH3 is strong to to convert propyne into a nucleophilic salt which in turn displaced tosylate in 2-methyl-1-tosyloxy propane to yield 5-methyl-2-hexyne.
Propyne and 5-methyl-2-hexyne. are still of the same homologous series,, so no triple bond is broken during the reaction
The essence of a reagent is to bring the reaction to its end point
First let us determine the electronic configuration of
Bromine (Br). This is written as:
Br = [Ar] 3d10 4s2 4p5
Then we must recall that the greatest effective nuclear
charge (also referred to as shielding) greatly increases as distance of the
orbital to the nucleus also increases. So therefore the electron in the
farthest shell will experience the greatest nuclear charge hence the answer is:
<span>4p orbital</span>
Answer:
<em><u>Gases can be easily liquefied into very small volumes and stored in liquid form Eg in LPGA cylinders and used in homes.</u></em>
<em><u>Gases can be easily liquefied into very small volumes and stored in liquid form Eg in LPGA cylinders and used in homes.Balloons can be easily filled with air.</u></em>
<em><u>Gases can be easily liquefied into very small volumes and stored in liquid form Eg in LPGA cylinders and used in homes.Balloons can be easily filled with air.Compressed natural gas is used as fuel in vehicles.</u></em>
<em><u>Gases can be easily liquefied into very small volumes and stored in liquid form Eg in LPGA cylinders and used in homes.Balloons can be easily filled with air.Compressed natural gas is used as fuel in vehicles.A sponge has holes filled with air and this makes it easy to compress it. </u></em>