All categories

3 years ago

How reactive is an atom of Sodium(Na) and why?

2 answers:

8 0

<span>Sodium (Na) is very reactive because it does not have a full valence shell. For any element, the reactivity is related to how full the valance shell is. If it's not full, but is easily made full, it's very reactive. If it's full, it's non reactive. The valance shell can be filled by either removing the electrons from it, or by adding electrons to it, which ever is the lower number of electrons. So with that in mind, let's look at the available choices and see what makes or doesn't make sense. Sodium (Na) is very reactive because it does not have a full valence shell. * This is correct. And because sodium only has 1 electron in its outer shell, it's very reactive since it can lose that electron very easily. This is the correct answer. Sodium (Na) is very reactive because it does not have enough protons in the nucleus. * The number of protons simply tells you what element it is, it doesn't have any effect on its reactivity except indirectly by determining how many electrons the atom has in its neutral state. So this is an incorrect answer. Sodium (Na) is not very reactive because it does not have a full valence shell. * Sodium is most definitely very reactive. If you don't believe that, just toss a chunk of it into the nearest body of water and see what happens. And since this option is claiming that sodium isn't very reactive, it's obviously wrong. Sodium (Na) is not very reactive because it can only bond with Chlorine (Cl) to become salt. * For the same reason that the previous choice was wrong, so is this one wrong.</span>

cricket20 [7]3 years ago

5 0

The correct option is this: SODIUM IS VERY REACTIVE BECAUSE IT DOES NOT HAVE A FULL VALENCE SHELL.
For an atom to attain an octet form, it must have eight electrons in its outermost shell. Elements with eight electrons in their outermost shells are un-reactive. Sodium has only one electron in its outermost shell, this makes it to be very reactive because it is very willing to react with suitable elements in order to become stable.

You might be interested in

Why can't liquids change volume but gasses can?

kupik [55]

Because liquids cant be condensed the way that gasses can for example in a tank of argon you can put 20 cubic feet because it can be be condensed but you could not fit 20 cubic feet of water because it can not be packed together .

4 0

3 years ago

Read 2 more answers

A 100.00 ml of volume of 0.500 M HCl was mixed with 100.00 ml of 0.500 M KOH in a constant pressure calorimeter. The initial tem

Virty [35]

Answer:

The heat of the reaction = -1985 J = -1.985 kJ

The enthalpy of the reaction is -39.7 kJ/ mol

Explanation:

<u>Step 1: </u>Data given

Volume of HCl = 100 mL the heat of the reaction = 0.1 L

Molarity of HCl solution = 0.500 M

Volume of KOH = 100 mL = 0.1 L

Molarity of KOH solution = 0.500 M

Initial temperature = 23.0 °C

Final temperature = 25.5 °C

Specific heat of the solution = 3.97 J/°C *g

Density of the solution = 1g/ mL

<u>Step 2: </u>Calculate heat

Q = m*c*ΔT

with m = the mass of both solution : 100g + 100 g ( since density = 1g/mL) = 200 g

c = the specific heat = 3.97 J/°C*g

ΔT = T2 -T1 = 25.5 = 23 = 2.5 °C

Q = 200g *3.97 J/°C*g * 2.5°C = 1985 J (= -1985 J because it's exothermic)

<u />

<u>Step 3:</u> Calculate the number of moles

Number of moles = Molarity * Volume

Number of moles = 0.5 * 0.1 L = 0.05 moles

(Moles of the acid are equal to the moles of water produced.

Moles of solution = 0.05 moles)

<u>Step 4: </u>Calculate the enthalpy of the reaction

ΔH = heat change /Number of moles

= -1.985 kJ/ 0.05 moles

=- 39700 J/mol = -39.7 kJ/ mol

The enthalpy of the reaction is -39.7 kJ/ mol

The enthalpy of the reaction is negative, this means the reaction is exothermic ( which means the final temperature is higher than the initial temperature.)

7 0

3 years ago

Which is NOT a way nitrogen can be fixed or made more useful?

stich3 [128]

This doesn’t have a multiple choice part to answer.

7 0

3 years ago

A sample of argon gas has a volume of 73 mL at a pressure of 1.20 atm and a temperature of 112 degrees Celsius. What is the fina

NeX [460]

Answer:

V₂ → 106.6 mL

Explanation:

We apply the Ideal Gases Law to solve the problem. For the two situations:

P . V = n . R . T

Moles are still the same so → P. V / R. T = n

As R is a constant, the formula to solve this is: P . V / T

P₁ . V₁ / T₁ = P₂ .V₂ / T₂ Let's replace data:

(1.20 atm . 73mL) / 112°C = (0.55 atm . V₂) / 75°C

((87.6 mL.atm) / 112°C) . 75°C = 0.55 atm . V₂

58.66 mL.atm = 0.55 atm . V₂

58.66 mL.atm / 0.55 atm = V₂ → 106.6 mL

3 0

3 years ago

The density of a material is a/an ___________.

Nitella [24]

The density of a material is an intensive property.

<h3>What is intensive property?</h3>

An intensive property of matter is one that does not change with the amount of matter. It is a bulk property, which means that it is a physical property that is independent of sample size or mass. An extensive property, on the other hand, is one that is affected by sample size.

<h3>What factors influence an intensive property?</h3>

Intensive properties are those that are determined solely by the characteristics of the material and not by its quantity - for example, density, temperature, refractive index, color, and pressure. Intensive properties are not additive, which means their value does not change when the amount of material is changed.

Learn more about the intensive property here:-

brainly.com/question/24909279

#SPJ4

5 0

2 years ago