elements of group 8a of the periodic table are known as the noble gases. determine which of the following properties are characteristic of all naturally occurring noble gases
Answers
Answer : The properties of noble gases which usually occurs in Group 8 A periodic table are described below;
i) They have an outer electrons configuration as
ii) Some elements like Ne and Ar does not form a stable chemical compounds.
iii) They have a large ionization energy, He has the largest ionization energy amongst the group.
The properties of noble gases are listed as follows:
1. These have outer electronic configuration of , except Helium.
2. These are monoatomic under standard conditions.
3. These have high ionization energies.
4. These are the least reactive elements in the periodic table.
5. These have low melting and boiling points.
Further Explanation:
Periodic table:
A systematic arrangement of elements in various rows and columns is known as a periodic table. Here, elements are arranged in increasing order of their respective atomic numbers so that elements with the same chemical and physical properties lie in same group. Horizontal rows are called periods and vertical columns are called groups. There are 18 groups and 7 periods in a periodic table.
Elements are further classified as metals, non-metals and metalloids in the periodic table. The elements placed at the left side of the table are called metals and the elements placed at the right of the table are called non-metals. Metalloids are the elements kept between metals and non-metals.
Elements of group 8A of the periodic table are known as noble gases. These are also known as rare or inert gases. Noble gases are present at the rightmost corner of the periodic table. Helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and radon (Rn) are the noble gases present in group 8A.
The general outermost electronic configuration of noble gases is , except helium whose electronic configuration is
. These have completely filled valence shells in these elements and therefore they have a total of 8 valence electrons in their outermost shells, except for helium.
Due to the presence of filled valence shells, these have no tendency to react with other elements and thus called inert gases. These are the least reactive elements present in the periodic table
The noble gases have complete valence shells so these do not lose electrons and thereby possess very high ionization energies. Helium has the highest ionization energy among all the noble gases.
Because of their low reactivities, noble gases exist as monoatomic gases under standard conditions. These have weak interatomic forces and therefore have very low melting and boiling points.
Learn more:
1. Which ion was formed by providing the second ionization energy? brainly.com/question/1398705
2. Write a chemical equation representing the first ionization energy for lithium: brainly.com/question/5880605
Answer details:
Grade: High School
Subject: Chemistry
Chapter: Periodic classification of elements
Keywords: noble gases, ns2np6, He, Ne, Ar, Kr, Xe, Rn, helium, neon, argon, krypton, xenon, periodic table, elements, groups, periods, 8A, high ionization energy, least reactive, low melting and boiling points.
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Why the radius of an atom cannot be determined precisely ?
Answers
Answers
Answer:
Five significant figures
Explanation:
You have to change the number to standard form
340500 = 3.405×10**5
** means raise to power
10**5
Where five represents the number of significant figures.
Answer:
4!
Explanation:
Answers
Answer:
To balance the chemical equation, I'll assume the reaction is carried out under standard conditions. Here's the balanced equation:
2 N2 (g) + 5 O2 (g) → 4 H2O (l) + 4 NO3- (aq)
Explanation:
To balance the number of nitrogen (N) atoms, we need 2 nitrogen molecules (N2) on the left side. This gives us a total of 4 nitrogen atoms on the left side.
To balance the number of oxygen (O) atoms, we need 5 oxygen molecules (O2) on the left side. This gives us a total of 10 oxygen atoms on the left side.
On the right side, we need 4 water molecules (H2O) to balance the hydrogen (H) atoms. This gives us a total of 8 hydrogen atoms on the right side.
Finally, to balance the oxygen (O) atoms on the right side, we need 4 nitrate ions (NO3-) since each nitrate ion contains one nitrogen and three oxygen atoms. This gives us a total of 12 oxygen atoms on the right side.
Now the equation is balanced with 4 nitrogen atoms, 10 oxygen atoms, 8 hydrogen atoms, and 4 nitrate ions on both sides.
Answers
Propanone is more soluble in water compared to propane mainly because propanone cannot hydrogen bond with themselves but can hydrogen bond with water molecules. One of the slightly positive hydrogen atoms in a water molecule can be sufficiently attracted to one of the lone pairs on the oxygen atom of propanone. In order for propane to bond with water, the van der Waals forces must be broken and also the stronger hydrogen bonds of water molecules and it needs a great amount of energy.
Answer:
Propanone is polar, and propane is nonpolar.
Explanation:
As we can see in the molecules below, propanone has a polar bond between Oxygen (in red) and the Carbon, because they have very different electronegativities. In the molecule of propane, there are only bonds between carbon and hydrogen, which have close electronegativities, so it's a nonpolar molecule. Water is polar too. The solubility law says that "polar dissolves polar, and nonpolar dissolves nonpolar".
It occurs because the positive pole of water (in the hydrogen) can bond with the negative pole in propanone (in oxygen) forming a hydrogen bond..
Answers
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c. When adding, the answer is determined by the number of decimal places
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e. The number 50,004 has five significant figures