Explanation:
It is known that neutral elements with same number of valence electrons will have same chemical properties. Therefore, elements of same group show similar chemical properties.
Thus, we can see that P and As belongs to group 15. So, they will exhibit similar chemical properties.
Both Ca and Ba belongs to group 2, hence they will exhibit similar chemical properties.
Whereas both He and Ar belongs to group 18 and they will exhibit similar chemical properties.
Answer:
molecus in a gas cool down
Explanation:
the molecules lose heat and energy do they slow down they move closer to other molecules and form a liquid
H2So4 is a strong acid and a strong electrolyte which means that when this dissociates in water, the dissociation process is complete. The first dissociation is
H2 SO4 = H + HSO4-
This can further release H+ and dissociate SO4- instead already
Answer:
(a) Chlorine atom
(b) 0
(c) 109.5°
(d) about the same
Explanation:
Perchlorate is a negatively charged molecule that is composed of one carbon atom and four oxygen atoms. In this molecule, the <em>central chlorine atom</em> that is present in +7 oxidation state, is covalently bonded to four oxygen atoms.
Thus the number of <u>bond pairs is 4</u> and the number of <u>lone pairs on the central chlorine atom is 0</u>.
So according to the VSEPR theory, perchlorate ion has a <em>tetrahedral geometry</em>. Therefore, the<em> </em><u>ideal bond angle for the perchlorate ion is 109.5°</u>.
<u>The actual bond angle of perchlorate is about the same as ideal bond angle.</u> This is because the perchlorate is <em>resonance stabilized</em> and thus all the chlorine-oxygen bonds are equivalent.