Since light waves can travel through an empty vaccum (which is what it is happening in this scenario) the sun radiates the light to us even though it takes 8 minutes to get here
also think of a lamp or a light on the ceiling as soon as you turn it on the light comes on to and if you were to put your hand on the light when it is on you will feel heat and the suns rays work the same way
Answer:
Mg + Fe(NO₃)₂ —> Fe + Mg(NO₃)₂
Explanation:
The activity series helps us to easily define whether or not a reaction will occur.
Elements at the top of the activity series are highly reactive and will always displace those at the bottom of the series in any reaction.
With the above information in mind, let us answer the questions given above.
Ag + NaNO₃ —> Na + AgNO₃
The above reaction will not occur because Na is higher than Ag in the activity series. Thus, Ag cannot displace Na from solution.
Pb + Mg(NO₃)₂ —> Pb(NO₃)₂ + Mg
The above reaction will not occur because Mg is higher than Pb in the activity series. Thus, Pb cannot displace Mg from solution.
Mg + Fe(NO₃)₂ —> Fe + Mg(NO₃)₂
The above reaction will occur because Mg is higher than Fe in the activity series. Thus, Mg will displace Fe from solution.
Cu + Mg(NO₃)₂ —> Cu(NO₃)₂ + Mg
The above reaction will not occur because Mg is higher than Cu in the activity series. Thus, Cu cannot displace Mg from solution.
From the above illustration, only
Mg + Fe(NO₃)₂ —> Fe + Mg(NO₃)₂
Will occur.
Answer:
Explanation:
As we move down the group atomic radii increased with increase of atomic number. The addition of electron in next level cause the atomic radii to increased. The hold of nucleus on valance shell become weaker because of shielding of electrons thus size of atom increased.
As the size of atom increases the ionization energy from top to bottom also decreases because it becomes easier to remove the electron because of less nuclear attraction and as more electrons are added the outer electrons becomes more shielded and away from nucleus.
On left side of periodic table atoms of metals are more reactive by loosing the electrons or we can say metals are more reactive by loosing the electrons so their reactivity increase down the group because of easily removal of electrons.
On right side of periodic table atoms of nonmetals are more reactive by gaining the electrons. As we move down the group nuclear attraction becomes smaller because of shielding thus electron are less attracted by nucleus and reactivity decreases.
