What is the electron configuration of helium

Answers

Answer 1

Answer: The configuration is 1s2 . Hope I answered and helped out! :)

Answer 2

Answer: $[He]:1s^2$

Related Questions

The standard cell potential for the aqueous reduction of Pb4+ to Pb2 + ions by the corresponding oxidation of Ce3+ to Ce4+ ions, Pb4 •(aq) + 2 Ce' •(aq) --'> Pb'•(aq) + 2 Ce4+(aq) is 0.06 V a
What is the maximum number of orbitals in a p sublevel? a. 2 b. 3 c. 4 d. 5
Which tiny, round “factory” puts together protein and is often found in the endoplasmic reticulum?A.chromosomeB.chloroplastC.Golgi bodyD.ribosome
How might you estimate the minimum temperature
210.0 °C a gas has a volume of 8.00 L. What is the volume of this gas at -23.0°C?

Mendeleev is the scientist who first developed the atomic model

the atomic theory

elements

the periodic table

Answers

Dmitri Mendeleev is the scientist who first developed the periodic table.

He is a Russian chemist and inventor who formulated the periodic law and created the periodic table of elements. He corrected some of the properties of the elements. Now, we can easily locate the elements we wanted to identify. With the help of Mendeleev, studying chemistry is not that difficult because he tried to simplify some of the concept that was complex before.

Which solution when mixed with a drop of bromthymol blue will cause the indicator to change from blue to yellow

Answers

hello!

bromothymol blue in aqueous solution gives a yellow color.

I hope I helped you

Mr. Fuller assigned his science class a lab comparing the masses of objects to the nearest gram using a balance. The mass of a paper clip is about 1 gram. How many paper clips will it take to balance the scale, if it is determined that a 1 centimeter cube of gold has the mass of 19.3 grams?

Answers

Like about 15 paper clips to balance the scale

Answer:

C) 19

Explanation:

took the test

Which statement is true about BF3, a nonpolar molecule? It has nonpolar bonds and a symmetrical structure. It has nonpolar bonds and an asymmetrical structure. It has polar bonds and a symmetrical structure. It has polar bonds and an asymmetrical structure. It has ionic bonds and symmetrical structure.

Answers

I think the correct answer is the first option. It has nonpolar bonds and a symmetrical structure. The structure of a BF3 molecule shows a symmetrical trigonal geometry. The net dipole moment of the molecule is zero therefore it is polar.

Answer: It has polar bonds and a symmetrical structure.

Explanation:

Formula used for calculating hybridization

$:{\text{Number of electrons}} =(1)/(2)[V+N-C+A]$

where, V = number of valence electrons present in central atom i.e. boron= 3

N = number of monovalent atoms bonded to central atom=3

C = charge of cation = 0

A = charge of anion = 0

$BF_3$

${\text{Number of electrons}} =(1)/(2)[3+3-0+0]=3$

The number of electrons is 3 that means the hybridization will be $sp^2$ and the electronic geometry of the molecule will be trigonal planar.

Thus as there are no lone pair of electrons, there is no distortion and the molecule is symmetrical. The B-F bonds are polar due to electronegativity difference but the polarities cancel due to symmetrical structure.

Carbon-14 is an isotope of carbon. How does it differ from other forms of carbon?

Answers

Carbon-14, also known as radiocarbon, is a radioactive isotope of carbon as compared to other forms of carbon. it contains 6 protons and 8 neutrons. The presence of such in organic materials is the basis of the radiocarbon dating method to date geological samples.

The two most abundant elements in earth's core are ?

Answers

The most abundant element in the earth core is oxygen the most essential and precious gas. Second most abundant element is silicon.

What are elements?

Elements are the basic things in the universe. Everything in the world is made of elements. Elements combines to form molecules, molecules then forms compounds and compounds makes the macrothings.

There are various kinds of elements such as metals, gases, metalloids. etc. These all elements shows their characteristic physical and chemicals behaviours. Based on their electronic properties all the elements are classified into various groups in periodic table.

Oxygen is the most abundant element in the earth core that we all are used to intake for respiration. Oxygen s 8th element in periodic table and it is in P-block.

Silicon is the second most abundant element in the earth core. Silicon is a metalloids in 14th group of p-block and it is 14th element in periodic table. It is used in many electronic devises.

To find more about silicon, refer the link below:

brainly.com/question/18902047

#SPJ5

The two most abundant elements in Earths core are Iron and Nickel.

Hope this helps!

Other Questions

In the world of chemistry a mole is a number of something a very large number of something.Just as a dozen is 12 of something a mole is about 6.02*10^23 of something.In chemistry we like the number of atoms or molecules in moles.If one mole is equal to 6.02*10^23 atoms and you have 9.00 *10^23 atoms then how many moles do you have?

In an experiment, Ann mixes concentrated sulfuric acid with water in a reaction test tube. The walls of the test tube turn hot.Which of the following type of reaction has occurred?A) endothermic B) exothermic C) reversible D) irreversible

Carbonic acid dissolves limestone and other rocks. This is an example of _____. chemical errosion

Why are resources limited