I believe the answer is
At the moment it is the best way of explaining our scientific knowledge.
To find average atomic mass, multiply each isotope's atomic mass with its relative abundance and add it all up.
15.012*0.1423 + 16.988*0.3348 + 19.177*0.5229 = 17.851 (5 s.f.)
Answer:
All alkali and alkaline earth metals dissolves in water to form alkaline solutions.
Explanation:
The alkali metals are found in group one of the periodic table while the alkaline earth metals are found in group 2. These two groups of elements are quite reactive and they react very well with air and water. All the elements in the two groups react with water to give rise to alkaline solutions; solutions whose pH range from 8 to 14.
Answer:
13.6 m
Explanation:
To find the wavelength, you need to use the following equation:
c = λ · f
In this equation,
-----> c = speed of light (3.0 x 10⁸ m/s)
-----> λ = wavelength (m)
-----> f = frequency (Hz)
You can plug the given values (speed of light and frequency) into the equation and then solve for "λ".
c = λ · f <----- Equation
(3.0 x 10⁸ m/s) = λ · (2.20 x 10⁷ Hz) <----- Insert values
13.6 = λ <----- Divide both sides by 2.20 x 10⁷
