What Group would this element be in?

Br2

I looked it up and it said that Bromine's formula is Br2

Answer:Br2

Explanation:

mass prior to chemival change is. thesame as mass after chemical change

Answer:

The first one??

Explanation:

Answer: The Atomic Number increases. Hope this helps!!!

Explanation:

Elements are arranged from left to right and top to bottom in order of increasing atomic number. Order generally coincides with increasing atomic mass.

Answer:

The Atomic number increases....

Explanation:

Duh

Answer:

D. Mitochondria

Explanation:

This is the one that makes the energy that powers the cell, aka, the powerhouse.

Answer:

A substance that is composed only of atoms having the same atomic number is ...  36 grams of an unknown liquid at its boiling point,.

Answer:

Wire.

Explanation:

The wire has movable electrons, which moves the charge and the electricity around.

Battery provides the electricity by electrical potential energy, not transport it.

The switch toggles between an open circuit and a closed one, where only the closed one has a full loop of wire to transport electricity.

And the light bulb uses electricity.

Hope this helped!

Answer:

the answer is true

Explanation:

I hope so it is helpful to u

Answer:

Metallic bond, force that holds atoms together in a metallic substance. ... The atoms that the electrons leave behind become positive ions, and the interaction between such ions and valence electrons gives rise to the cohesive or binding force that holds the metallic crystal together.

Explanation:

Answer:

Explanation:

neon

Answer: Dinitrogen pentoxide

Explanation:

Answer:

Dinitrogen Pentoxide

Explanation:

Answer:

An organism will always express a dominant trait in the offspring if the dominant allele is present, even if there is only one copy

Explanation:

Hope this helps u:)

Answer:

dense

Explanation:

Answer: dense

Explanation:

Answer:

True

Explanation:

Answer:

3.375moles of O₂

Explanation:

The reaction expression is given as;

                   2KClO₃ → 2KCl + 3O₂

Number of moles of KClO₃  = 2.25moles

Now;

To find the number of moles of O₂ produced we use known number of moles.

So;

                  2 mole of KClO₃ will produce 3 moles of O₂

                 2.25moles of KClO₃ will produce [tex]\frac{2.25 x 3}{2}[/tex]   = 3.375moles of O₂

Answer:

Because selenium is in the 16th column on the periodic chart, it has 6 valence electrons. Thus, the Lewis structure (or electron dot structure) for selenium has 6 dots around it.

It will look similar to this without the underscores:

__.

. Se:

_. .

Explanation:

The Lewis structure (or electron dot structure) for selenium has 6 dots around it.

Electron dot diagrams are diagrams in which the valence electrons of an atom are shown as dots distributed around the element's symbol.

Selenium is in the 16th column on the periodic chart, it has 6 valence electrons. Thus, the Lewis structure (or electron dot structure) for selenium has 6 dots around it.

Learn more about electron dot structure here:

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Answer:

The number of protons or electrons in its atomic structure

Explanation:

Elements are substances which constitute the building block of matter. The smallest particles of elements that can ever exist are known as atoms. Atoms of different elements are different in their structure properties. This difference is due to to the number of sub-atomic particles present in the atom of each element.

The three sub-atomicparticles are protons, neutrons and electrons. Protons and neutrons are present in the nucleus of an atom, while the electrons revolve around the nucleus in orbits. The identity of each element is determined by the number of protons present in the atomic nucleus of that element. This is known as the atomic number of that element. For neutral atoms, the proton number is equal to electron number.

For the given element, the electron and proton number are respectively 4, therefore, the atomic number of the element is 4. The element with atomic number 4 is Beryllium.

The precipitate that will be formed : AgF

One indication of the double displacement reaction is the precipitation reaction

Solubility Rules:  

• 1. soluble compound  

All compounds of Li +, Na +, K +, Rb +, Cs +, and NH4 +  

All compounds of NO₃⁻ and C₂H₃O₂⁻  

Compounds of Cl−, Br−, I− except Ag⁺, Hg₂²⁺, Pb²⁺  

Compounds of SO₄²⁻ except for Hg₂²⁺, Pb²⁺, Sr²⁺, Ba²⁺  

• 2. insoluble compounds  

Compounds of CO₃²⁻ and PO₄³⁻ except for Compounds of Li +, Na +, K +, Rb +, Cs +, and NH₄ +  

Compounds of OH− except Compounds of Li +, Na +, K +, Rb +, Cs +, NH₄⁺, Sr²⁺, and Ba²⁺  

Reaction

NaF(aq) + AgNO₃(aq) →NaNO₃(aq)+ AgF(s)

From the solubility rules above, it has been shown that the salts of the Ag⁺ cations are insoluble salts

Answer:

See explanation

Explanation:

Julie Sandel, the Criminalist  made several mistakes in handling this investigation. They include;

It is true that handwriting can be deduced by comparing a suspects's handwriting to the questioned document, however Julie made a mistake by not making the suspect to write many pages. The suspect may intentionally decide to change his/her hand writing. This trick can be neutralized by asking the suspect to write several pages.

Secondly, the suspect ought to have been given a pencil and paper similar to the one used to write the threatening document. Rather, Julie gave the suspect a pen.

Thirdly, the suspect only wrote half a page instead of a full page. Secondly, Julie took only two exemplars when she should have taken more.

She should not have dictated the spelling of any word to the suspect. The examiner is not supposed to do that.

The threatening documents should have first been shown to the document examiner before taking the exemplars.

Answer:

Option C. Decomposition

Explanation:

To know which option is correct, it is important we know what is a single displacement reaction, double displacement reaction and decomposition reaction.

A Single displacement reaction can be defined as a reaction in which a single element is replaced by another element in a compound.

A double displacement reaction is a reaction involving the exchange of ions of two parts of ionic compounds to form two different compounds.

A decomposition reaction is a reaction in which a compound splits into two or more simpler compound or element.

Bearing the above definitions in mind and considering the question given above, we can conclude that the reaction given in the question above is a decomposition reaction since the compound (NH₄OH) splits into two different compound (NH₃ and H₂O)

Answer:

A. Japan

Explanation:

Answer:

japan xd

Explanation:

Answer:

I believe that the answer is c

Explanation:

The snails will split hope this helps! <3

Answer:

A. Over time, genetic differences between individual snails will increase.

Explanation:

It take 0.54 hours to deposit 6.36g of copper

Faraday's Law I

"The mass of the substance formed at each electrode is proportional to the electric current flowing in the electrolysis

W = e.i.t / 96500

[tex]\tt \large {\boxed {\bold {W \: = \: \dfrac {e \times i \: x \: t} {96500}}}}[/tex]

e = equivalent = Ar / valence

i = current, A

t = time, s

W=6.36 g

e = 63.5 : 2 =31.75

i = 10 A

[tex]\tt t=\dfrac{W\times 96500}{e.i}\\\\t=\dfrac{6.36\times 96500}{31.75\times 10 }\\\\t=1933.04~s\approx 0.54~hours[/tex]

Answer:

Orbital geometry is Tetrahedral

Molecular geometry is Bent/V shape

Explanation:

Using the VSEPR theory which states that

so we have Y as the central atom and it has 2X substituents on its either sides with two lone pairs on Y. This is a case of Y which has

2 bonds with X on either sides

2 lone pairs on Y

The orbital geometry will be Tetrahedral but its Molecular geometry will be Bent/V shaped

The formula of the compound will be YX2

Water with chemical Formula of H2O bears the same features.

The shape of the given molecule according to the VSEPR theory has been Bent/V shape.

VSEPR theory has been the Valence Shell Electron Pair Repulsion theory. It helps in the determination of the molecular and geometrical shape based on the presence of the atoms attached.

The given molecule has the presence of 2 single-bonded X atoms.

The atoms repel each other, while the presence of loan pairs results in the force for the molecule to occupy the tetrahedral orbital geometry. The repulsion from the loan pair to the X atoms acquires the Bent V shape as molecular geometry.

For more information about the VSEPR theory, refer to the link:

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