Answer:
They are Lithium Li, Sodium Na, Potassium K
Explanation:
An equation is the symbolic representation of a chemical reaction based on the conservation of mass.
The law of conservation of mass states that mass can neither be created nor it can be destroyed. The volume and the density of the matter may be changing but mass will remain constant. Or it could be represented by a balanced chemical equation, which is a chemical equation that shows all mass is conserved during the entirety of the reaction. For example, N_{2} + H_{2} -----> NH _{3} is an unbalanced chemical equation. In order to balance the said equation, we need to add coefficients to equalize the number of atoms on both the reactants and product sides. This will give us a new equation and that is N_{2} + 3H_{2} -----> 2NH _{3}. Through this the mass of the atoms are conserved.
The order of decreasing energy is ultraviolet rays, infrared rays, and microwaves.
Frequency is defined as the number of occurrences of the event. In wave function, frequency is the number of times the given waveform passes through a given point. The SI unit of frequency is Hertz.
Photons are particles that do not contain mass but possess energy. Photon energy is calculated by the formula Planck's constant h ( 6.63✖10-34 J/s) multiplied by the frequency. Hence frequency is directly proportional to the energy of the photon.
Higher frequency waves will have higher energy. Lower frequency waves will have lower energy.
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Rank the following photons in terms of decreasing energy:
(a) IR (v = 6.5 x 10¹³ s⁻¹)
(b) microwave (v = 9.8 x 10¹¹ s⁻¹)
(c) UV (v = 8.0 x 10¹⁵ s⁻¹)
Playing outside or going bike riding
Answer:
C.
Explanation:
The law of conservation of mass states that matter cannot be created or destroyed in a chemical reaction. For example, when wood burns, the mass of the soot, ashes, and gases, equals the original mass of the charcoal and the oxygen when it first reacted. So the mass of the product equals the mass of the reactant.