Answer: (a) The products are
and AgCl. The balanced equation is
.
(b) The type of reaction is double displacement reaction.
Explanation:
(a) The complete reaction equation will be as follows.
![BeCl_{2}(aq) + 2AgNO_{3}(aq) \rightarrow Be(NO_{3})_{2}(aq) + 2AgCl(s)](https://tex.z-dn.net/?f=BeCl_%7B2%7D%28aq%29%20%2B%202AgNO_%7B3%7D%28aq%29%20%5Crightarrow%20Be%28NO_%7B3%7D%29_%7B2%7D%28aq%29%20%2B%202AgCl%28s%29)
Number of atoms on reactant side are as follows.
- Be = 1
- Cl = 2
- Ag = 2
= 2
Number of atoms present on product side are as follows.
- Be = 1
- Cl = 2
- Ag = 2
= 2
Here, number of atoms on both reactant and product side are the same. Hence, it is a balanced chemical equation.
(b) A reaction in which two reactant species tend to change their ions with each other and form new compounds. This type of reaction is called double displacement reaction.
As the given reaction is as follows.
![BeCl_{2}(aq) + 2AgNO_{3}(aq) \rightarrow Be(NO_{3})_{2}(aq) + 2AgCl(s)](https://tex.z-dn.net/?f=BeCl_%7B2%7D%28aq%29%20%2B%202AgNO_%7B3%7D%28aq%29%20%5Crightarrow%20Be%28NO_%7B3%7D%29_%7B2%7D%28aq%29%20%2B%202AgCl%28s%29)
This shows that ions are being exchanges by the reactants
and
. The ions are
,
,
and
.
Therefore, this reaction is a double displacement reaction.
The atomic number of an atom (Z) is equal to the number of protons.
The mass number of an atom (A) is equal to the number of protons plus the number of neutrons (N), i.e. A = Z + N
Therefore, N = A - Z = 7 - 3 = 4.
So, this neutral lithium atom has 4 neutrons.
Answer: 4.
The discoverer of the electron was Thomson. J. J. Thomson portrayed his atom model to look like a plum pudding. In his model, he described that an atom is composed mainly of electrons stuck within a sea of positive material. So its C
It is equal to a gram, as there are 1,000,000 milligrams in a gram.
Answer:
they have the same number of electrons in their outer energy level