Answer:
Explanation:
In cobalt - 65 ,
no of protons is 27 ( p )
no of neutron = 65 - 27 ( n )
= 38
n / p ratio
= 38 / 27
= 1.41
If case of emission of alpha particle
no of proton p = 27 - 2 = 25
no of neutrons = 38 - 2 = 36
n / p ratio = 36 / 25
= 1.44
So it increases
In case of emission of beta particle
No of neutron n = 38 - 1 = 37
No of proton = 27 + 1 = 28
n / p ratio = 37 / 28
= 1.32
Hence ratio decreases.
Hence beta ray decay will result in decrease in n / p ratio.
<span> A huge meteor struck the earth and caused the chemicals to change.</span>
ionic bond:
Bond formed when an atom donates its electron and other atom receives those electrons.
polar covalent:
Bond formed by equal sharing of electrons between both the atoms and there is an electronegativity difference between the two atoms.
Nonpolar covalent:
Bond formed by equal sharing of electrons between both the atoms and there is no electronegativity difference between the two atoms.
Metallic:
Formed between two metals.
So the bond between :
Phosphorus and chlorine-polar covalent bond as it is formed by equal sharing of electrons between both the atoms and there is an electronegativity difference between the two atoms.
Potassium and oxygen -ionic bond as here potassium donates its electron and oxygen receives those electrons
Fluorine and fluorine -Non polar covalent bond as formed by equal sharing of electrons between both the atoms and there is no electronegativity difference between the two atoms.
Copper and aluminum-metallic bond as Formed between two metals.
Carbon and fluorine -polar covalent bond as it is formed by equal sharing of electrons between both the atoms and there is an electronegativity difference between the two atoms.
Carbon and hydrogen --Non polar covalent bond as formed by equal sharing of electrons between both the atoms and there is no electronegativity difference between the two atoms.
Aluminum and oxygen--ionic bond as here aluminum donates its electron and oxygen receives those electrons
Silver and copper --metallic bond as Formed between two metals.
Answer:
a) 24 g
b) 56.4 g
c) Físico.
d) Cambio de sólido a líquido.
Explanation:
Hola.
a) En este caso, dado que sabemos que el recipiente completo con agua pesa 56.4 g y vacío pesa 32.4 g, podemos calcular la masa de agua en el recipiente por medio de una resta:
b) Aquí, no es necesario calcular nada, ya que la masa de agua líquida que se congela es la misma de hielo formada, por tanto el recipiente con el hielo tendrá la misma masa de 56.4 g.
c) Aquí, dado que el agua cambia solamente de estado, sigue siendo agua, por tanto dicho proceso es físico.
d) La fusión, la definimos como un proceso físico en el que una sustancia en estado sólido cambia a estado líquido a partir de la adición de energía térmica que permite la separación de las moléculas hacia el estado líquido.
¡Saludos!