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In 50 words , describe the rescue (Precis)A fertilizer or fertiliser is any material of natural or synthetic origin that is applied to soil or to plant tissues to supply plant nutrients. Fertilizers may be distinct from liming materials or other non-nutrient soil amendments. Many sources of fertilizer exist, both natural and industrially produced.
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a) Mass No: 39
Atomic No: 19
No of proton: 19
No of elektron : 19
No of neutron : 20
Elektron configuration of element : 1s² 2s² 2p⁶ 3s² 3p⁶ 4s¹
b) (i) BaCl2
(ii) NaNO2
(iii) AlN
(iv) CaCO3
Explanation:
Mass No: 39
Atomic no=no of electron = no of proton = 19
No of neutron : 39-19=20
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