Question

The atomic numbers of elements x y z are 8,12,17 respectively which of these elements belong to the same period

Answer 1

Answer:

Atomic no. of X = 9

Electronic configuration = 2,7

Valence electrons = 7

Valency of X=1

Atomic no. of element Y = 11

Electronic configuration of Y = 2,8,1

Valency of Y= 1

Atomic no. of element Z = 17

Electronic configuration of Z = 2,8, 7

Valency of Z=1

The element X and Z have same number of valence electrons and since chemical properties depends on the valence electrons. So, Element X and Z will show similar chemical properties

Answer 2

The atomic numbers of the elements x and y are the same because the valence electrons are the same.

• The elements x, y, and z exist in the same periodic table.
• Chemically their oxides are acidic, amphoteric, and basic respectively.
• When these elements are arranged in ascending order of an atomic number they are: The elements x, y, and z are present in the same periodic table.
• Oxygen, the sign of element O, is the atomic element number 8 in the periodic table.
• This means that each oxygen atom has 8 protons.
• Changing the number of electrons creates ions while changing the number of neutrons makes different isotopes of the element, but the number of protons remains unchanged.
• 8 Oxygen [He] 2s 2 2p 4
• Electronic configuration of the element with the atomic number of 12 magnesium 1s22s22p63s2.
• The valence shell is 2, which means three.
• Chlorine is a chemical marked with Cl and the atomic number 17.
• The second-simplest halogen, seen between fluorine and bromine in the periodic table
• Chlorine's atomic number is 17.
• The chemical marker of Chlorine is Cl.
• The number of protons in Chlorine is 17. The atomic weight of Chlorine is 35.45 u or g / mol.
• The melting point of Chlorine is 34.6 ° C and its boiling point is 101 ° C. Chlorine is a bright green-yellow gas, with a pungent odor and very toxic properties.
• The electronic configuration is 2,8,7. So valency = 8-7 = 1.
• Its valency is 1 and non-metal and is in the 17th class.