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3 years ago

What is the Free valence electrons and how can i count it?

Chemistry

2 answers:

Leto [7]3 years ago

8 0

Answer:

An atom can have 1 or more shells the electrons present in the last shell or valence shell are called free electrons or valence electrons

How to count the free electrons or valence electrons:

Step 1: Write the electronic configuration of the atom

Step 2: The number which in the last is the number of free electrons

For example:

1) Sodium

Its electronic configuration is 2,8,1

The last number is 1 so Sodium has 1 valence electron

2) Chlorine

Its electronic configuration is 2,8,7

The last number is 7 so it has 7 valence electrons

Ivan3 years ago

7 0

Answer:

Hey Mate, here is ur answer

Explanation:

Valence electrons are electrons that are loosely bound to an atom. Free electrons are completely unbound to any atom. Valence electrons are responsible for the chemical reactions and chemical bonding of atoms. Free electrons take part in heat and electricity conduction of a lattice structure.

To find valence electrons using a period table, first see if your atom is a transitional metal, which are the elements in the middle rectangle of the table. If the atom is outside this block, locate its group number along the top of the table. The ones digit in the group number is the number of valence electrons.

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In each of the following sets of elements, which element would be expected to have the smallest atomic size?

yan [13]

Answer:

d) C,O,F

Explanation:

because if you add up the atomic no.s (which is directly the size of the element)of each set d) is smallest.

3 0

3 years ago

shtirl [24]

Answer:

A. Nonmetals have relatively high ionization energies.

Explanation:

Nonmetals have high ionization energies because they tend to gain electrons in order to fill their outer shell. Also, the electrons are closer to the nucleus and require more energy to remove them.

Hope that helps.

7 0

3 years ago

Ozone consists of ________ oxygen atom(s).

Anon25 [30]

The ozone molecule consists of three atoms of oxygen (O₃).

8 0

4 years ago

A balloon is inflated with helium to a volume of 45L at room temperature (298K). If the balloon is cooled to 200.K, what is the

igor_vitrenko [27]

Answer:

V₂ = 30.20 L

Explanation:

Given data:

Initial volume = 45 L

Initial temperature = 298 K

Final temperature = 200 K

Final volume = ?

Solution;

The given problem will be solve through the Charles Law.

According to this law, The volume of given amount of a gas is directly proportional to its temperature at constant number of moles and pressure.

Mathematical expression:

V₁/T₁ = V₂/T₂

V₁ = Initial volume

T₁ = Initial temperature

V₂ = Final volume

T₂ = Final temperature

Now we will put the values in formula.

V₁/T₁ = V₂/T₂

V₂ = V₁T₂/T₁

V₂ = 45 L × 200 K / 298 k

V₂ = 9000 L.K / 298 K

V₂ = 30.20 L

8 0

3 years ago

Chrysanthenone is an unsaturated ketone. If Chrysanthenone has M+ = 150 and contains 2 double bond(s) and 2 ring(s); what is its

snow_lady [41]

Answer:

the Molecular formula will be; C10H14O

Explanation:

Given the data in the question;

Chrysanthenone is an unsaturated ketone,

it has M+ = 150 and contains 2 double bond(s) and 2 ring(s).

molecular formula = ?

we know that ketone contain 1 oxygen and mass of oxygen is 16

so mass of the C and H remaining will be;

⇒ 150 - 16 = 134

Now we determine the number of C atoms;

⇒ 134 / 13 = 10

hydrocarbon with 10 hydrogen atom have CnH2n+2 means

⇒ ( 10 × 2 ) +2 = 22 hydrogens

But then we have 3 unsaturation meaning 6 hydrogens less and also we have ring meaning 2 more hydrogens

⇒ 22 - 6 - 2 = 14

Hence the Molecular formula will be; C10H14O

4 0

3 years ago