Which biotic factor do all living things depend on?
O Water
Plants
O Air
(due today please help!!)

Answer:

Atoms bonds with 8 electrons

Explanation:

Octet rule is a chemical rule that shows elements in main group bond so that each atom have 8 valence electrons in the outmost shell which make them to have similar electronic configuration with Noble gases This is important because the sharing of electrons make atoms to have full shell. Atoms with electrons not up to 8 react with more stable compound.

Answer: Metalloids

Explanation:

Answer:

Al3+

Explanation:

Aluminium has an electronic configuration of 2, 8, 3 and the outermost valence electrons is +3 since it is a metal

Elements acquire positive or negative charges by losing or gaining electrons. The element which have 3+ charge among the options is boron (B) Hence, option B is correct.

Boron is 5th element in periodic table and it is classified into 13th group. Boron is a metalloid and shows properties intermediate to metals and non metals.

The electronic configuration of boron is K =2, N =3. Atoms lose or gain electrons as per their valency to become stable. According to octet rule atoms become stable when their valence shell get completely filled.

Boron have 3 electrons in its valence shell. If it donate these three electrons into an electronegative atom, its K shell become its valence shell and it is completely filled. Thus boron becomes stable.]

When atoms loses electrons they acquire positive charge and this charge is numerically equal to the number of electrons lost. Thus boron acquire 3 unit of positive charge by donating its 3 electrons. Hence, option B is correct.

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Your question is incomplete. But your complete question probably was :

Which element below would have a 3+ charge as an ion?

answer choices.

nitrogen (N).

boron (B).

silicon (Si).

argon (Ar)

Carbon-12

Carbon-12 is the reference for all atomic mass calculations. An atomic mass unit is defined as a mass equal to one twelfth the mass of an atom of carbon-12.

Answer:

see the pict for the answers

Answer:

HCl

Explanation:

1 hydrogen 1 chlorine

Answer:

Hydrogen cannot have more than two electrons. Hydrogen bonds to only one other atom at a time.There are too many electrons in the final structure.

Explanation:

Answer:

Explanation:

Hydrogen cannot have more than two electrons. Hydrogen bonds to only one other atom at a time. There are too many electrons in the final structure.

Answer:

It is letter B.

Explanation:

believe my answer cause I answered this kind of question in ny exam

When a reaction is in equilibrium, and the product is removed, the equilibrium shifts to the right, towards the product.

Equilibrium is a stage, when there is no change in the mass and energy of the reaction.

When more reactant added in the equilibrium stage, the equilibrium shifts toward the left, and when product added the equilibrium shifts towards the right, product.

Thus, When a reaction is in equilibrium, and the product is removed, the equilibrium shifts to the right, towards the product.

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Answer:

D

Explanation:

Because speed is a scalar quantity which he has only magnitude and no direction while velocity is a vector quantity because it has both magnitude and direction.

Answer:

In the Lewis structure for PF3 there are a total of 26 valence electrons. Three pairs will be used in the chemical bonds between the P and F.

Explanation:

The most typical example of deposition would be frost. Frost is the deposition of water vapour from humid air or air containing water vapour on to a solid surface. Solid frost is formed when a surface, for example a leaf, is at a temperature lower than the freezing point of water and the surrounding air is humid.

Answer:

b

Explanation:

Reduction is the process of gaining of electron. The equation that describes  a reduction is option b, Cl reduces Cl- by accepting an electron.

Reduction is the process of reaction with hydrogen or accepting one or more electrons. In reduction, a species reduces to its lower oxidation state. The process of losing electron is called oxidation. Elements forms their higher oxidation states in oxidation state.

Mg metal loses its two electron giving Mg²⁺ , Na metal loses its one electron giving Na+ are all oxidation. Similarly Al metal giving Al³⁺ ions is oxidation.

Atoms when gain electron, they acquire negative charges. Cl have 7 valence electrons and it need one more electron to achieve octet. Hence it gains an electron forming its lower oxidation state Cl⁻. Here, oxidation state decreases from 0 to -1.

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The balanced equation for the reaction is

3CuCl₂(aq) + 2Al(s) = 2AlCl₃(aq) + 3Cu(s). The correct option is - D) 3CuCl2(aq) + 2Al(s) = 2AlCl3(aq) + 3Cu(s)

From the question,

We are to determine which of the given equation for the described reaction is balanced.

The described reaction is the reaction between aqueous copper (II) chloride and solid aluminum to produce aqueous aluminum chloride and solid copper.

That is,

CuCl₂(aq) + Al(s) = AlCl₃(aq) + Cu(s)

Now, we will balance the above equation, using the smallest whole number coefficients

The balanced equation for the reaction is

3CuCl₂(aq) + 2Al(s) = 2AlCl₃(aq) + 3Cu(s)

Hence, the balanced equation for the reaction is

3CuCl₂(aq) + 2Al(s) = 2AlCl₃(aq) + 3Cu(s). The correct option is - D) 3CuCl2(aq) + 2Al(s) = 2AlCl3(aq) + 3Cu(s)

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Answer:

Salt particles move about the water. Each particle is surrounded by water molecules.The water particles (molecules) keep the salt particles from rearranging themselves back into a salt crystal. Salt particles are carried throughout the solution surrounded by water particles.

As the water evaporates less and less water molecules are present to keep the salt particles apart. The salt therefore recrystalises and can be collected.

Explanation:

Hope this helped!

-B

Answer:

The Helium particles will be faster than the Nitrogen particles

Explanation:

This is because the particles of both elements have the same average kinetic energy (they are at the same temperature), but Nitrogen atoms are heavier than Helium atoms, and therefore they move slower in accordance to Newton's second law of motion, f=ma. The larger massed Nitrogen atoms take more energy to move so they are slower because both particles have the same energy.

Answer:

True

Explanation:

Answer:

chemical

Explanation:

physical change has to do with the five scenes

Answer:

4.5cm

Explanation:

Answer:

4.5 centimeters

Explanation:

1 mm = 0.1 centimeters

45 x 0.1 = 4.5

Answer:

Desert gravel

Explanation:

A desert is an arid region where precipitation is very low all year round.

Wind action such as erosion, transportation and deposition is the most active denudation force in this sort of terrain.

Answer: B

Explanation:

Answer

2,8,18,18,1

Explanation:

Hydrogen changes from a gas to a liquid at a temperature of -252.77°C (-422.99°F) and from a liquid to a solid at a temperature of -259.2°C (-434.6°F). It is slightly soluble in water, alcohol, and a few other common liquids.

Answer:

In Niels Bohr's theory of the atom, electrons absorb and emit radiation of fixed wavelengths when jumping between fixed orbits around a nucleus. The theory provided a good description of the spectrum created by the hydrogen atom, but needed to be developed to suit more complicated atoms and molecules.

Explanation:

Answer:

Over time he discovered that the Moon-like phases of Venus demonstrated that the neighboring planet had an orbit independent of Earth. This showed conclusively that Venus circled the Sun, as Copernicus thought, not Earth, as Ptolemy thought. But it did not yet prove conclusively that Earth circled the Sun.

Answer: Option #3 or C. Jupiter has moons orbiting it.

Explanation:  Galieo found moons of Jupiter, conflicting with teachings of Aristotle and Ptolemy.

So the correct answer is option # 3 or C. Did it on Edge got it right! :)

Question: What is some of the evidence used by Galileo to support Copernicus’s model and disprove Aristotle and Ptolemy’s?

Options Given:

A. Each planet spins in an epicycle.

B. Planets appear to move backward.

C. Jupiter has moons orbiting it.

D. The religious and cultural beliefs supported this model.