La capa de valencia es la capa más externa de cualquier átomo y corresponde al último nivel de energía. Los electrones que se encuentran en la capa de valencia se denominan electrones de valencia. Todos los elementos forman compuestos gracias a una fuerza de atracción que mantiene unidos los átomos, creando agrupaciones estables, esta fuerza se denomina enlace químico. La formación del enlace químico se explica con la tendencia que tienen todos los átomos de lograr estructuras similares a la del gas noble más cercano dentro de la Tabla Periódica, para adquirir estabilidad, completando ocho electrones en su último nivel de energía. A este comportamiento se le denomina “regla o ley del octeto” y para cumplir con esta regla o ley, los átomos pueden recibir, ceder o compartir electrones. Según la configuración electrónica de cada elemento indicar los electrones de valencia para cada uno.

Identify one disadvantage to each of the following models of electron configuration: dot structures arrow and line diagrams written electron configurations type in your answer below.

The alkali metals (group 1) consist of lithium (3), sodium (11), potassium (19), rubidium (37), cesium (55), and francium (87). they are soft, metallic solids with low densities and low melting points. based on the data shown in figure 1, how many valence electrons do alkali metals share?

Plz me ! 1 which of earths spheres contains most of its mass? a atmosphere b hydrosphere c geosphere* d biosphere 2 erosion and weathering are examples of which types of forces? a constructive forces b destructive forces* c gravitational forces d inertia-related forces 3 which of the following statements about earths atmosphere is true? a earths atmosphere contains 78% water vapor which is essentail to life b earths atmosphere contains 21% oxygen c earths atmosphere contains carbon dioxide which all life forms require d earths atmosphere allows radiation from the sun to pass through it and warm earths surface* 4 the strenght of the force of gravity between two objects is determined by which of the following factors? select all that apply a the messes of the objects* b the distance between the objects* c the volumes of the objects d the surface area of the objects 5 earth and moon are kept in there respective orbits due to the influence of a inertia b gravity c gravity and inertia* d neither gravity or inertia if you answer all questions right i will give