Explanation:
Alkali metals forms the group 1 of the modern periodic table. They include Lithium, sodium, potassium, rubidium, cesium, and francium.
The general electronic configuration of the alkali metals -
. They have 1 valence electron.
Ionization energy is the minimum amount of energy which is required to knock out the loosely bound valence electron from the isolated gaseous atom.
<u>Thus, removal of the valence electron leads to the alkali metals having noble gas electronic configuration and which is stable. Thus, the removal of the second electron is very tough and thus, there a large increase between the first and second ionization energies of the alkali metals.</u>
Filtration of wastewater flowing over a surface of land with vegetation and
water is a biodegradable treatment.
Biodegradable substances are those which can be recycled for other uses
such as manure etc. The filtration of the waste water helps to remove
organic materials and pathogens present in it. The organic materials
removed can then be used for other purposes.
The pathogens are then destroyed to prevent the spread of diseases within
the area. The explanation makes biodegradable treatment most appropriate.
Read more on biodegradable treatment on brainly.com/question/1172912
Answer:
a) p = 1.10 * 10⁻²⁷ kg·m/s
b) p = 9.46 * 10⁻²⁴ kg·m/s
c) p = 3.31 * 10⁻³⁶ kg·m/s
Explanation:
To solve this problem we use the <em>de Broglie's equation, </em>which describes the wavelenght of a photon with its momentum:
λ=h/p
Where λ is the wavelength, h is Planck's constant (6.626 * 10⁻³⁴ J·s), and p is the linear momentum of the photon.
Rearrange the equation in order to solve for p:
p=h/λ
And now we proceed to calculate, <u>keeping in mind the SI units</u>:
a) 600 nm= 600 * 10⁻⁹ m
p=(6.626 * 10⁻³⁴ J·s) / (600*10⁻⁹m) = 1.10 * 10⁻²⁷ kg·m/s
b) 70 pm= 70 * 10⁻¹² m
p=(6.626 * 10⁻³⁴ J·s) / (70*10⁻¹²m) = 9.46 * 10⁻²⁴ kg·m/s
c) 200 m
p=(6.626 * 10⁻³⁴ J·s) / (200m) = 3.31 * 10⁻³⁶ kg·m/s
Answer:
2
Explanation:
In the equation, Cl is chlorine and there is a number "2" so that the correct answer is 2.
Step 1. - Scientists first take a look at their empirical evidence and try to explain it.
Step 2. - Scientists test if their explanation or conclusion is logical.
Step 3. - If their explanation is logical, they search for new test that may help them to support their first idea.
