Which statements about freshwater sources are true? Check all that apply. O Only about 3 percent of Earth's water ís fresh water.
O Most of the fresh water on Earth is groundwater.
O About 75 percent of the fresh water on Earth is frozen in ice sheets.
O The largest source of usable fresh water is groundwater.
O More fresh water is in the atmosphere than in rivers and lakes.

Only about 3% of the water in the Earth is fresh water and about 75 % of the fresh water on Earth is frozen in ice sheets.  

•The most vital element present on the Earth is water. All the living beings are dependent on it.  

•Water is present in the majority of the Earth, however, of this only 3% of the water is freshwater, the rest is saline and undrinkable.  

•Of this 3%, the 75 percent of the freshwater is present in the form of ice and glaciers in the polar region.  

•The remaining 24 percent is the groundwater and the rest 1 percent includes the waters of rivers, lakes, and ponds.  

•The prime source of usable freshwater is present in the trapped form in the ice and glaciers.  

Thus, the correct statements are 1st and 3rd.

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Explanation:

1 is true

2 is false

3 is true

4 is true

5 is false

That is what I got from researching.

"among the transition metal elements, manganese and zinc have a slight lowering of electronegativities. the reason behind this is that the nuclear charges of these elements are slightly weaker than the other transition metal elements due to the way their valence electrons are filled up. both manganese and zinc have their valence electrons filled up to the 4th shell with 1 pair of electrons (4s2) completely occupying it. although the electrons in the 3rd shell (3d) are yet to be paired since the outer most shell is filled up, the ability of the nucleus to attract electrons is lessened. hence,   the electronegativity (or the ability to attract electrons) is lessened."