Answer:a.Oxygen
Explanation:s you move from left to right, electronegativity increases. This means that oxygen is one of the most electronegative elements because it is situated on the right part of the periodic table. ... Oxygen has 6 valence electrons so it can still attract 2 more electrons to fill the valence shell.
Answer:
(Ca2 +, Mg2 +, Na+, and K+) and four major anions ( , , SO 4 2 - , and Cl-) with ionic forms of N, P, Fe, and other trace elements at lower concentrations (Livingstone 1963, Meybeck 1979) (Table 4.7).
Answer: 25.5°C
Explanation: take the average of the reading i.e (25 + 26)/2= 25.5
Answer
Ultraviolet
Explanation
The types of radiation and their wavelength are:
Gamma < 10⁻¹² m
X-rays 1 nm - 1 pm
Ultraviolet 400 nm - 1 nm
Visible 750 nm - 400 nm
Near-infrared 2.5 μm - 750 nm
Infrared 25 μm - 2.5 μm
Microwaves 1 mm - 25 μm
Radio waves > 1 mm
Hence, the given wavelength of 2.86 X 10⁻⁸ m corresponds to Ultraviolet.