<span>
</span>Basic Calcium Facts
Name: Calcium
Atomic Number: 20
Element Symbol: Ca
Group: 2
Period: 4
Block: s
Element Family: Alkaline Earth
Atomic Mass: 40.078(4)
Electron Configuration: [Ar]4s<span>2
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Full: 1s22s22p63s23p64s2 (full)
Answer: Option (c) is the correct answer.
Explanation:
Water cycle is a process in which water circulates from point to another into the atmosphere. This means that water in the form of rain falls on the ground and then through the process of evaporation it reaches back to the atmosphere and clouds.
Energy from the Sun is highly responsible for carrying out the process of water cycle. This is because when water falls on from clouds it seeps through rivers, mountains, lakes etc into the oceans and then heat energy from the sun evaporates this water and it rises to make clouds and help in rainfall and snow.
Therefore, we can conclude that energy from the Sun is the most responsible force driving the water cycle.
Answer:
1. They will react.
2. 2HCI + Zn —> ZnCl2 + H2
Explanation:
1. From the question given above,
We can see that Zn is higher than H in the activity series.
NOTE: Elements higher (i.e at the top) in the activity series will displace those lower (i.e at the bottom) in the series. Thus, Zn is higher in the series than H. Therefore, Zn will displace H from solution. Hence, they will react.
2. The product obtained from the reaction can be seen as follow:
HCI + Zn —> ZnCl2 + H2
The above equation can be balance as follow:
There are 2 atoms of H on the right side and 1 atom on the left side. It can be balance by putting 2 in front of HCl as shown below:
2HCI + Zn —> ZnCl2 + H2
Their formation involves rapid cooling