Ph of this solution would be 4
We are asked to describe how electrons fill orbitals in the periodic table. Among these, the correct statement is that electrons fill orbitals in order of increasing energy from left to right. This is verified by Aufbau principle. We see that as we move across from left to right, as the group number increase, the number of valence electron/s of each group also increases.
Answer is: C. H₂, molecule of hydrogen, g is c<span>hemistry abbreviations or physical state symbol for gas.</span>
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Lithium (Li) is solid (s) element (metal).
Water (H</span>₂O) is liquid (l) compound or molecule.
Lithium hydroxide (LiOH) is aqueous solution (aq). It dissociates in water on lithium cation (Li⁺) and hydroxy anion (OH⁻).
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Answer:
B = Frequency = 4.3 × 10¹⁴Hz
Explanation:
Given data:
Speed of light = 3 × 10⁸ ms⁻¹
Wavelength of light = 7.0 × 10⁻⁷ m.
Frequency = ?
Solution:
Formula:
<em>Speed of light = wavelength × frequency</em>
Frequency = Speed of light /wavelength
Frequency = 3 × 10⁸ ms⁻¹ /7.0 × 10⁻⁷ m.
Frequency = 0.43 × 10⁸⁺⁷ s⁻¹
Frequency = 0.43 × 10¹⁵s⁻¹
s⁻¹ = Hz
Frequency = 4.3 × 10¹⁴Hz
