Which two elements are in the same group based on their atomic model?
Please help me with this ASAP.

Answer:

Potential energy

Explanation:

When an object is moving its called Potential energy.

When an object is not moving it is called kinetic energy.

Explanation:

1. Attachment

Electron dot structure of H2S (hydrogen sulfide)

2. Attachment

Electron dot structure of F2 (Fluorine).

Answer:

0.5 mol of nitrogen gas.

Explanation:

18g of Magnesium in mol is equal to 18g/24 gmol-1 = 0.75 mol and 7g of nitrogen in mol is equal to 7g/14 gmol-1 = 0.5 mol,

Thus, When 18g of magnesium reacts with 7g of nitrogen it implies 0.75 mol of magnesium which reacts with 0.5 mol of nitrogen. :)

The number of moles of nitrogen gas which react with 18 g of magnesium

to form magnesium nitride compound is 0.5mol.

We need to find the number of mole for magnesium and nitrogen.

Mole= mass/molar mass

Magnesium= 18g/24gmol⁻¹ = 0.75mol of Mg

Nitrogen= 7g/14gmol⁻¹ = 0.5mol of N

This implies that when 18g of magnesium reacts with 7g of nitrogen it

means 0.75 mol of magnesium which reacts with 0.5 mol of nitrogen.

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to be honestl id ldm

Answer:

D is the correct option.

Explanation:

A seismograph detects seismic waves which travel through the Earth, that is mainly rock(taking from the options given)

Answer:

It is just rock!

Explanation:

Answer:

huh I can't understand

Explanation:

what are your language bro

Answer:

The one at the top: cuticle

The highest line on the right side: palisade layer

The third line on the left: chloroplast

The line near phloem: vein

The line at the bottom: stomata

Entirely on the attachment.

Explanation:

No need.

Answer:

Combustion

Explanation:

The process of adding oxygen to anything is called combustion

Answer:

volcano is the likely answer

Sodium (Na) and Argon (Ar) on the periodic table does not have similar properties.

PERIODIC TABLE:

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Explanation:

here is the answer attached

Answer:

Explanation:

1. Virus's are hard to detect because of their simple construction.

2. Some mutate very easily.

3. It is hard to isolate the virus and kill it without doing damage to the host.

Answer:

Chemical bonds form when the valence electrons of one atom interact with the valence electrons of another atom

Explanation:

It is known that an electron pair represents a domain. Hybridization of BF_{3}BF3 will be calculated as follows.

       Hybridization = \frac{1}{2}[\text{Valence electrons of central atom + no. of bonded atoms + negative charge - positive charge}]21[Valence electrons of central atom + no. of bonded atoms + negative charge - positive charge]

Valence electrons of boron are 3 and no. of bonded atoms in a BF_{3}BF3 molecule is 3.

Therefore, calculate hybridization of BF_{3}BF3 as follows.

          Hybridization = \frac{1}{2}[\text{Valence electrons of central atom + no. of bonded atoms + negative charge - positive charge}]21[Valence electrons of central atom + no. of bonded atoms + negative charge - positive charge]

                              = \frac{1}{2}[3 + 3 + 0]21[3+3+0]

                               = 3

Hence, hybridization of BF_{3}BF3 is sp^{2}sp2 , that is, trigonal planar.

Thus, we can conclude that the given image represents that it is a trigonal planar molecule with three domains.        

Answer:

electron pair => 1 covalent bond => same as H:H

Explanation:

The bar notation is generally accepted as a pair of electrons depicting a 'single' chemical bond. If two bars are shown (e.g; C=C) then two chemical bonds are represented. If three bars are shown (e.g; N≡N) then three chemical bonds are represented. This is the highest number of bonds that can exist between two elements. Hope this helps. :-)

Answer:

I believe it is B

Explanation:

I am on this lesson too :)

Answer:

III  Electropositivity increases down the group

Explanation:

Answer:

Temperature and pressure are the two factors which are responsible for change in state of matter.

Solid – In a solid, the attractive forces keep the particles together tightly enough so that the particles do not move past each other. ... In the solid the particles vibrate in place. Liquid – In a liquid, particles will flow or glide over one another, but stay toward the bottom of the container.

Hope this helps, mark as Brainliest please...

Answer:

I believe the answer is ;_; 8-14

Im sorry if im wrong

Answer: 8-14 is the right answer

Explanation:

Answer:

You can but because it is almost 1500 lightyears away it appears blurry and somewhat hard to find. So the answer to your question is yes but not with the naked eye. You need a telescope lens to see it as more than a blurry spot in the sky.

Explanation:

Answer:

A) FeO

Explanation:

Options:

A) FeO

B) FeO2

C) Fe2O

D) Fe7O2

The correct answer is A) FeO.

(Hope this helps can I pls have brainlist (crown)☺️)

The empirical formula of a compound that contains only iron and oxygen and is 22.27% oxygen is FeO. The correct option is A.

The simplest whole number ratio of atoms in a chemical molecule is its empirical formula. The empirical formula is the chemical formula that gives the number of atoms of the chemical formula that is given in the chemical reaction.

For example, the C₆H₁₂O₆ is the formula of glucose. The simplest formula is CH₂O. This will be the simplest ratio of this compound. The first one, this C₆H₁₂O₆ is the molecular formula.

It only contains the element one quantity.  The empirical formula that contains oxygen and iron will be FeO. The empirical formulas is calculated by dividing the simplest formula.

Thus, the correct option is A) FeO.

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The question is incomplete. Your most probably complete question is given below:

A) FeO

B) FeO2

C) Fe2O

D) Fe7O2

Answer: Matter cannot be created or destroyed in chemical reactions.

Explanation: This is the law of conservation of mass. In every chemical reaction, the same mass of matter must end up in the products as started in the reactants. Balanced chemical equations show that mass is conserved in chemical reactions.

Answer:

Introduction to Basic Microscopy. Microscopes are specialized optical instruments designed to produce magnified visual or photographic (including digital) images of objects or specimens that are too small to be seen with the naked eye.

Microscope are the important tools which are used by scientist. For example, in material science, medicine, mineralogy and microbiology.

Light microscope is able to send light. Light is being focused in a tight breath whereby that light passes through a sample which later it is able to create an image. This image passes to different lenses which magnifies it until it reaches the camera.

There are different types of microscope for example, Compound light microscope, Simple light microscope, and monocular microscope.

In simple light microscope only one lens which which is being used to magnify an object and it is not able to reach to a higher magnification.

In compound light microscope it uses two lenses to produce image. For example eyepiece lens and objective lens.

Explanation:

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1. The equation representing the equation is ~

[tex] \mathrm{Na + Cl\rightarrow NaCl}[/tex]

The given reaction is a redox reaction because there's a transfer of electron from Sodium (Na) to chlorine (Cl)

where sodium is oxidized (due to loss of electron) and chlorine get reduced (due to gain of electron).

2. Sodium is a highly reactive element which belongs to the 1st group of periodic table, hence it can catch fire if it is kept free in atmosphere. so in order to prevent that it is stored in kerosene oil, which doesn't let Sodium come in contact with air .

Answer:

The answer is true. ozone in the stratosphere is a toxic pollutant that can cause tightness or shortness of breath.

Answer:

46.2 amu

Explanation:

The average atomic mass of an element can be determined using the percentage abundance and mass of its isotopes. The average atomic mass of the hypothetical element Jovian is 46.2 amu.

Most of the elements have two or more isotopes in nature with different percentage abundance and mass. The average atomic mass of the element is then calculated using the formula written below:

Average atomic mass = % abundance /100 × mass of isotope 1  +  % abundance /100 × mass of isotope 2 + .....

Given the mass % abundance of Jovian -44 = 22.4 %

Jovian- 46 = 44 %

Jovian -48 = (100 - (44 + 22.4)) = 33.6 %

Average atomic mass of Jovian  =  ( 22.4 /100 × 44 ) +  ( 44 /100 × 46) +  ( 33.6  /100 × 48 ) = 46.2 amu

Therefore, the average atomic mass of the hypothetical element is 46.2 amu.

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Answer:

Refer to the attachment

Answer:

Because each atomic number is unique.

Explanation:

Atomic number = No. of protons in an element

Each atomic number in each element is unique and that makes it easier to distinguish it between several elements.

Answer:

Because atomic numbers are unique to the element

hope this helps <3