Chemistry Questions

Electronegativity is the tendency for an atom to attract electrons. There are general trends on the periodic table which you can use to determine the relative electronegativity for different elements, but otherwise you can also look at their valence shell and effective nuclear charge to determine their relative electronegativity.

Here from the given options, Lithium has least tendency to attract electrons and thus has a lower electronegativity.

The Chemical name of Gold is Aurum with symbol Au with atomic number 79 and a group 11 element. In its purest form, it is a bright, slightly reddish yellow, dense, soft, malleable, and ductile metal.

Chemically, gold is a transition metal.

There are many isotopes of uranium and all of them have same atomic number i.e, sum of nmber of neutrons and protons.

The chemical element gold has an atomic number 79 is present in period 6 and group 11 of the periodic table.

Here I give you the first 30 Atomic elements names and their Atomic masses.

Atomic number      Element        Atomic mass
                             

        1                 Hydrogen           1

        2                  Helium              4

        3                 Lithium              6.94

        4                Beryllium            9.01

        5                  Boron               10.81

        6                Carbon               12.01

        7                Nitrogen             14.01

        8                Oxygen              15.99

        9                Fluorine              19.00

       10                Neon                 20.18

       11               Sodium               22.99

       12             Magnesium           25.31

       13             Aluminium            26.98

       14               Silicon                28.09

       15             Phosphorus           30.97

       16               Sulphur               32.07

       17               Chlorine              35.45

       18                Argon                 39.95

       19             Potassium              39.10

       20              Calcium                40.08

       21             Scandium              44.96

       22             Titanium               47.87

       23            Vanadium              50.94

       24             Chromium            24. 52

       25            Manganese            54.94

       26                Iron                  55.85

       27              Cobalt                 58.93

       28               Nickel                 58.69

       29              Copper                 63.55

       30                Zinc                   65.41

Nitrogen is found as a diatomic molecule (N2) in nature. There is a triple bond between the two nitrogen atoms.

The triple bond is pretty strong. Therefore, it needs a lot of energy to break those bonds and participate in a reaction. So nitrogen is commonly referred to as and used as an inert gas (high abundance & low cost.) However, it’s not truly inert like most noble gases. Nitrogen does react if the conditions are met. But those conditions are not exactly mild, but are not as extreme as for noble gases.

It forms nitric oxide and nitrogen dioxide with oxygen, ammonia with hydrogen, and nitrogen sulfide with sulfur.

Corn, sugar cane, and sorghum are C4 plants. These plants are economically important in part because of their relatively high photosynthetic efficiencies compared to many other crops.