1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Sonbull [250]
3 years ago
12

An atom has the following electron configuration.

Chemistry
2 answers:
vagabundo [1.1K]3 years ago
8 0

<u>Answer:</u> The number of valence electron in the given atom are 5

<u>Explanation:</u>

Valence electrons are defined as the electrons which are present in the outermost shell of an atom. Outermost shell has the highest value of 'n' that is principal quantum number.

For the given electronic configuration:  1s^22s^22p^63s^23p^64s^23d^3

When an element belongs to d-block, the number of valence electrons are present in ns,np\text{ and }(n-1)d orbitals

Here, n = 4

The electrons in '4s' orbital = 2

The electrons in '3d' orbital = 3

Number of valence electrons = 2 + 3 = 5

Hence, the number of valence electron in the given atom are 5

V125BC [204]3 years ago
3 0

Answer:

5

Explanation:

The valence electrons are the electrons that are located in the outermost shel of an atom.

Writing the configuration properly, we have:

                         1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d³

In this atom, there is a total number of 23 electrons. This is a transition metal.

The 4s and 3d orbitals are in the outermost energy levels and so their electrons are valent.

You might be interested in
Write a balanced chemical equation for the reaction that occurs when Mg(s) reacts with Cl2(g).
Julli [10]

Explanation:

When magnesium reacts with chlorine then it forms magnesium chloride.

Equation -

Mg + Cl₂ → MgCl₂

This is the example of Combination reaction.

5 0
3 years ago
If enough changes occur in the gene pool of a species, it is possible that a new species would be created.
lianna [129]

Answer:

Yes

Explanation:

A gene pool is the sum total of all the genes(sum of alleles)of a species and population at any given time is known as gene pool.

The new species are created in nature by four mechanisms such as geographic isolation (allopatric speciation), reproductive isolation (sympatric speciation), mating behaviour (parapatric speciation).

Due to any of these factors when population acquire unique changes in their genes and enough changes have been introduced in the gene pool of the population with time, two population become distinct from each other and not able to interbreed leads to the formation of new species.

6 0
3 years ago
How many electrons would an uncharged atom of nitrogen have
dybincka [34]
The atomic number represents the number of protons in an atom's nucleus. In an uncharged atom, the number of protons is always equal to the number of electrons. For example, carbon atoms include six protons and six electrons, so carbon's atomic number is 6.
3 0
3 years ago
What cause the ratio of PV/RT to drop below 1 when 1 mole of
pentagon [3]

Answer:

pressure and temperature are directly proportional.

Explanation:

At constant temperature and pressure the volume of a gas is directly proportional to the number of moles of gas. Also given a constant temperature and volume the pressure of a gas is directly proportional to the number of moles of gas.

This means that if V is constant then

P = n (RT/V) then n= PV/RT. As P is increased, T is also increased thereby decreasing the value of n since pressure and temperature are directly proportional.

6 0
3 years ago
Given the chemical reaction Fe3O4 + H2 ⟶ Fe + H2O, identify the coefficient of H2O in the balanced equation.
Kay [80]
Add 4H2 in the reactant side, that will give you 4H2O in the product side.
5 0
3 years ago
Read 2 more answers
Other questions:
  • Ethanol is a/an A. organic acid. B. substituted hydrocarbon. C. aromatic hydrocarbon. D. carbohydrate.
    15·1 answer
  • If two poisonous elements are combined chemically, which of the following will be true of the resulting compound?
    14·2 answers
  • Select ALL that apply for how to name a BINARY acid. *
    12·1 answer
  • Which statement best describes the compressibility of a gas?
    10·1 answer
  • Use Scientific Notation
    13·1 answer
  • Describe the structure of a soap
    10·1 answer
  • El petróleo crudo, es decir, en estado natural,
    12·1 answer
  • Plz help Which is an example of an abiotic factor interacting with a biotic factor in an ecosystem?
    6·1 answer
  • Whos good at the periodic table cus im not help
    13·2 answers
  • HURRY ! Kumar is producing the photoelectric effect by using red light. He wants to increase the energy of emitted electrons. Ba
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!