Order the following elements from least to greatest ionization energy. f, s, k, caa
a. f < s < k < cab)
b. k < ca < s < fc
c. s < f < ca < kd
d. k < ca < f < s

Option B

Explanation:

Given elements are F, S, Ca, K

Assuming that the order of ionization energies is asked for first ionization energy

Ionization energy is defined as the minimum energy required to remove an electron from its valence shell

Among these elements K will have least ionization energy because it requires minimum energy to remove an electron form its outer most shell as after removing the valence electron it will gain octet configuration, therefore it wants to loose that valence electron

Among the given elements F has maximum ionization energy because of its small size and high nuclear charge and due to this maximum amount of energy is required to remove the valence electron

While comparing between Ca and S, S has maximum ionization energy because of its small size and high nuclear charge

∴ Order is K < Ca < S < F

a  solution  is always transparent, light passes through with no scattering from solute particles which are molecule in size. the  solution  is homogeneous and does not settle out. a colloid is intermediate between asolution  and a  suspension. while asuspension  will separate out a colloid will not.

answer: -

reaction:

na + cl ⇌ nacl

balanced chemical equation:

na + 2cl ⇌ nacl2

sodium + clorine goes to form sodium chloride (table salt).

the product is nacl2.

and the reactants are na and cl.

(note: if you don’t know what ⇌ means, read below: -

⇌(double head arrow) means reversible reaction).