Solution: The answer is (b) refraction of light by different layers of varying refractive indices Explanation: The refraction of light maintains the change in the position of the source of light....

Solution: Nitrogen is the correct answer, as it possesses five electrons in its outermost shell.

Solution: Covalent bonding is formed by ammonia.

Solution: The position of sulfur is Group 16 Period 3.

Solution: 2FeSO4 Fe2O3+SO2+SO3Sulphur oxides are acidic in nature

Solution: Element X is Sulphur2,8,6

Solution: (a)The electropositive character of the element(s) increases as it progresses through the group and diminishes as it progresses through time. (b) The element's electronegativity drops as...

Solution: (a)The electropositive character of the element(s) increases as it progresses through the group and diminishes as it progresses through time. (b) The element's electronegativity drops as...

Solution: (a)The electropositive character of the element(s) increases as it progresses through the group and diminishes as it progresses through time. (b) The element's electronegativity drops as...

Solution: c) Gallium-Group 13 Period 4 is a periodic table of elements. The elements germanium and gallium are both metalloids; however, gallium is a metal. d) Germanium contains four electrons, but...

Solution: a) Eka-Silicon was replaced by germanium, while Eka-Aluminum was replaced by gallium. b) Gallium was replaced by germanium. b) Germanium-Group 14 Period 4 (Germanium-Group 14).

Solution: a) H, He, Li, Be, B, C, N, O, F, Ne, Mg, Al Si, P, S, Cl, Ar, K, Ca b) Group 1:H, Li, Na, K Group 2: Be, Mg, Ca Group 13: B. Al Group 14: C, Si Group 15: N. P Group 16: 0, S Group 17: F. U...

Solution: Across 1) Magnesium 3) Tin 4) Iodine Down 2) Sodium 5) Lithium 6) Neon 7) Astatine 8) Iron 9) Boron

Solution: (c)Nitrogen and Neon belong to period 2. Calcium and silicon belongs to Period 3. (d)Electronic Configurations Neon-2,8 Calcium-2,8,8,2 Nitrogen-2,5 Silicon-2,8,4

Solution: During the formation of chemical compounds or molecules, an element's valence or valency is measured in terms of its ability to combine with other atoms, which is known as its combining...

Solution: The answer of the following is: (a)X is in Group 17, period 3 and Y is in group 2 Period 4. (b)X is Non-metal and Y is metal

Solution: c) Y Oxide will be a fundamental element in nature. Ionic bonding results in the formation of a compound. d) The electron dot structure:

Solution: The answer: (c) 2Mg+O2  $\to$ 2MgO (d) MgO+ H2O $\to$ Mg(OH)2

Solution: Lewis structures, also known as Lewis dot formulas, Lewis dot structures, electron dot structures, or Lewis electron dot structures, are diagrams that depict the bonding between atoms in a...

Solution: The answer is Aluminium Group 13 Period 3

Solution: The answer of the following: Carbon Group 14 Period 2Helium Group 18 Period 1

Solution: The answer for the following are: Sodium Group 1 Period 3Phosphorus Group 15 Period 3

Solution: (a) Sodium (b) Calcium  (c) Mercury and order of reactivity : Hg < Ca < Na

Solution: The arrangement in order required is Ge < Ga < Mg < Ca < K

Solution: The letter K represents element A. (Potassium). It would be possible to have the electrical configuration of element A (atomic number 19) as 2, 8, 8, 1. Because it has only one valence...

Solution: The names of the following are: MagnesiumSodiumChlorineLithium Metals from the following are- Magnesium, Sodium, Lithium.

Solution: The elements in question are all members of the same group and are sorted from left to right. As a result, their atomic radii are increasing in order of magnitude. a)Li>Be>F>N b)...

Solution: From electron arrangement X -2, 8, 2 Y -2, 8 Because Y has fewer energy levels than X, the atomic radius of Y will be less than that of the latter.

Solution: A belongs to Group 13, B belongs to Group 14, and C belongs to Group 2. A belongs to Group 13 and B belongs to Group 14. The values of A, B, and C are 3, 4, and 2, respectively.

Solution: Eka-silicon is a kind of germanium (Ge). It belongs to group 4 of Mendeleev's periodic table, and as a result, it has a valency of four. GeCl4 is the chemical formula for its chloride....

Solution: It is possible to find instances in Mendeleev ′s Periodic Table in which elements with higher atomic masses are put before ones with lower atomic masses, and vice versa. As a result, items...

Solution: Because of the following factors, hydrogen holds a unique place in the Modern Periodic Table. The outer electronic configuration of hydrogen and alkali metals is comparable because both...

Solution: Despite the fact that the atomic mass of Silicon is equal to the average of the atomic masses of Sodium and Chlorine, the elements do not have the same physical properties and hence cannot...

Solution: a) Metals include sodium, magnesium, aluminum, and potassium. Halogens include the elements F and Cl. There are two sets of elements in total.b) Mendeleev's law of periodicity is...

Solution: Triads are a type of arrangement of elements that is commonly found in nature. For example, the elements lithium, sodium, and potassium form a trio. These elements have atomic masses of...

Solution: The answer is (b) decreases Explanation: When we move from left to right in a period, the radius of the atom shrinks, and as a result, the size of the atom reduces as well.

Solution: The answer is (c) Valence Explanation: In the periodic table, advancing down a group does not result in an increase in the number of valence electrons present.

Solution: The answer is (b) (ii) and (iii) Explanation: Atomic radius, which is defined as the distance between the nucleus and the outermost orbital, is clearly displayed in photos ii) and iii),...

Solution: The answer is (b) Metalloid Explanation: Silicon has an electrical configuration of 2, 8, and 4 atoms. Considering that the outermost shell has just four electrons, it requires an...

Solution: The answer is (a) An element with atomic number 7 Explanation: The element with atomic number 7 has electron configuration 2,5, which means it has the ability to gain three electrons and...

Solution: Answer is (c) E2O3 Explanation: Aluminum is Al with an oxidation state of +3, it may be converted into Al3+, and it has a valency of +3. $Al_2O_3$ will be formed as a result.Gallium and...

Solution: The answer is (b) Na >Mg >Al >Si > Cl Explanation: Na has one electron in its valence shell, magnesium has two, aluminium has three, and chlorine has seven electrons in its valence shell....

Solution: The answer is (d) F, O, N Explanation: As you move from left to right over a period, the radius of an atom grows. The atomic numbers (N7), O(8), and F(10) are listed in increasing sequence...

Solution:The answer is (d) P Explanation: The electronic configurations of Na, Al, Si, and P are 2,8,1, 2,8,3,2,8,4, and 2,8,5 for the elements in the periodic table. The number of valence electrons...

Solution: The answer is (b) L shell Explanation: There are two shells in period 18, designated as K and L.

Solution: The answer is b) group 14 Explanation: Carbon is an essential ingredient of all organic molecules that are members of the 14th chemical group.

Solution: The answer is (c) Group 18 Explanation: Because group 18 has all of its outermost shells entirely filled, any element having an electrical configuration falls into this category.

Solution: The answer is (b) B, C, D Explanation: The first period is dominated by the element with the highest atomic number, whereas the second period is dominated by elements B, C, and D.

Solution: Answer: (b) (i), (ii) and (iii) Explanation:...