Question

Assertion (A):The 19th electron in potassium atom enters into 4s-orbitol and not the 3d- orbital.
Reason(R):(n+l) rule is followed for determining the orbital of the lowest energy state.The correct choice is,
(A)Both (A) and (R) are true and (R) is the correct explanation of (A).
(B)Both (A) and (R) are true but (R) is not the correct explanation of (A).
(C)(A) is true but (R) is not true.
(D)(A) is not true but (R) is true. ​

Answer 1

Answer:

physical properties of metals metals are malleable metals are good conductors of heat and electricity metals are lustrous metal surface when freshly prepared in this property property of shining surface of metals is known as metal cluster.pariksha npat centre has a shiny white surface gold is yellow where as copper is British pounds of a silver and gold are used for making jewellery since they have a bright shining surface which is not easily tour nished by moisture and atmospheric gases due to their shining surface metals are good reflectors metals are generally hard metals have high tensile strength metals are solid at room temperature metals are generally high melting and boiling point metals generally have densities accept sodium and potassium which have low densities metals are sonorous