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2 years ago

Why does the lithium atom develop a positive charge?

Chemistry

1 answer:

nikitadnepr [17]2 years ago

6 0

Answer:

Lithium develops a positive charge because it has one valence electron. Instead of lithium trying to steal 7 electrons from other elements to obtain an octet, it is easier to lose its one electron to become stable. Because neutral atoms contain the same amount of protons and electrons, when lithium loses one electron, there is one more proton than electrons.

In other words

Lithium has 3 protons and 3 electrons in its neutral state, but it loses one electron to become stable so it now has 3 protons and 2 electrons, and there is one more proton than electrons: +3 -2 = +1 charge

Explanation:

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vaieri [72.5K]

Answer:

This process is known as doping. It can be done by adding either of two types of impurity to the crystal.

(A) By adding electron rich impurities i.e., group 15 elements to the silicon and germanium of group 14 elements.

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3 years ago

The density of concentrated ammonia, which is 28.0% w/w nh3, is 0.899 g/ml. what volume of this reagent should be diluted to 1.0

vlada-n [284]

Answer: 2.4 ml

Solution :

Molar mass of $NH_3$ = 17 g/mole

Given,: 28% w/w of $NH_3$ solution means 28 g of ammonia in 100 g of solution.

Mass of solution = 100 g

Now we have to calculate the volume of solution.

$Volume=\frac{Mass}{Density}=\frac{100g}{0.899g/ml}=111.2ml$

Molarity : It is defined as the number of moles of solute present in one liter of solution.

$Molarity=\frac{n\times 1000}{V_s}$

where,

n = moles of solute $NH_3=\frac{\text {given mass}}{\text {molar mass}}=\frac{28}{17}=1.65moles$

$V_s$ = volume of solution in liter = 0.11 L

Now put all the given values in the formula of molarity, we get

$Molarity=\frac{1.65moles}{0.11L}=15mole/L$

Using molarity equation:

$M_1V_1=M_2V_2$

$15\times V_1=0.036\times 1.0\times 10^{3}$

$V_1=2.4ml$

6 0

3 years ago

Define 'hellowin '<br>is it celebrated ?

Thepotemich [5.8K]

Answer:

The word "Halloween" comes from All Hallows' Eve and means "hallowed evening."

Halloween's origins can be traced back to the ancient Celtic festival known as Samhain, which was held on November 1 in contemporary calendars. It was believed that on that day, the souls of the dead returned to their homes, so people dressed in costumes and lit bonfires to ward off spirits.

Explanation:

4 0

3 years ago

Read 2 more answers

What is the mass of ether(0.71) which can be put into a beaker holding 130ml

UkoKoshka [18]

D=m/v ⇒ m=d*v

d=density
m=mass
v=volume

d(ether)=0.71 gr/cm³=0.71 gr/ ml
v=130 ml

m=d*v
m=0.71 gr/ml*(130 ml)=92.3 g

Solution: m=92.3 g

6 0

3 years ago

Determine the rate law, including the values of the orders and rate law constant, for the following reaction using the experimen

olga55 [171]

Answer: Rate law= $k[A]^1[B]^2$ , order with respect to A is 1, order with respect to B is 2 and total order is 3. Rate law constant is $3L^2mol^{-2}s^{-1}$

Explanation: Rate law says that rate of a reaction is directly proportional to the concentration of the reactants each raised to a stoichiometric coefficient determined experimentally called as order.

$Rate=k[A]^x[B]^y$