Help with question 01.4 pleaseeee

Answer:

Groups like the Halogens, which include Chlorine and Flourine, share similar properties both behaviorally and structurally. The Periodic Table is essentially a bunch of patterns and trends and the groups (like the one with Sodium and Potassium) were grouped together because of these similarities.

Explanation:

https://en.wikipedia.org/wiki/Alkali_metal

Answer:

pretty sure there is a calculator

Explanation:

there is a calculator for it ( that's what I do ) btw there is a calculator for every even science or chemistry

Answer:

Explanation:

The elements in the long form of periodic table are classified into four blocks. They are s, p, d and f-block elements. The classification is based on the name of orbitals which receive the last electron. The elements in which the valence shell electron enters the s-orbital are called s-block elements.

Answer:

H=1

Li=1

Na=1

Be=2

Mg=2

B=3

Al=3

C=4

Si=4

N=5

P=5

O=6

S=6

F=7

Cl=7

Ne=8

Ar=8

He=8

Explanation:

Answer:

The person above me got one wrong

Explanation:

Answer:

adding the standard atomic masses (in g/mol) of the constituent atoms.

Answer:

Density is defined as how tightly or loosely packed a substance is, or to the number of things or people in a certain area.

Answer:

Ionic bond

Explanation:

Answer:

6 inches and that should be the answer

false, the rusting of iron can be prevented by painting, oiling, greasing or varnishing its surface.

Answer:

covalent bonds

Explanation:

Taking into account the definition of density,  assuming all other conditions remain the same, increasing mass will cause an object's density to increase.

Density is defined as the property that matter, whether solid, liquid or gas, has to compress into a given space. That is, density is a quantity referred to the amount of mass contained in a given volume.

Density is an intensive property since it does not vary with the amount of substance.

Since density is the relationship between the mass and the volume of a substance, its calculation is defined as the quotient between the mass of a body and the volume it occupies:

[tex]density=\frac{mass}{volume}[/tex]

In the previous expression it can be observed that the density is inversely proportional to the volume: the smaller the volume occupied by a certain mass, the greater the density.

On the other hand, density is directly proportional to mass: the greater the mass, the greater the density.

Finally,  assuming all other conditions remain the same, increasing mass will cause an object's density to increase.

Learn more about density:

Explanation:

The charge of a helium atom is zero

It is neutral because

The number of unit negative charges = number of unit positive charges

One unit negative charge = -1.6 x 10^(-19) which is basically the charge of an electron

One unit positive charge = +1.6 x 10^(-19) which is basically the charge of a proton

A helium atom has 2 protons and 2 electrons, so it is neutral

NOTE: an alpha-particle (He2+) is a charged helium atom it has 2 protons and 0 electrons. Charge of an alpha particle = +3.2 x 10^(-19).

Answer:

The answer option which best describes nuclear fission is: C. A nucleus collides with a neutron and splits, releasing energy.

A nuclear reaction can be defined as a type of reaction in which the nucleus of an atom is transformed by either being joined (fusion) or split (fission) with the nucleus of another atom of a radioactive element and accompanied by a release of energy.

Explanation:

Answer:

its classified as a molecule

Answer:

4. I think that they started with water that was the same tsmpurature because if they didnt start with the same temp of water then it would be harder to tell which one was better. and could hold the most heat.

5. yes i think it would matter, because if you have more water in one cup it might stay warmer than it would with the cups with less water, and if it was thicker it would hold mor heat because it is not so thin that the heat is just gonna come out it has to come through more for the heat to get out.

Explanation:

sorry if these are to long but thats how i would answer them.

hope it helped

Answer:

true

Explanation:

ionic transfer of e^- ions formed (charges)

ionic=non-metal+ metal

ex: F+Ca

covalent sharing e^- no true charges

covalent= non-metal+ non-metal

ex: F+P

( my notes)

This seems to be a Hess' Law problem. Hess' Law states that "states that regardless of the multiple stages or steps of a reaction, the total enthalpy change for the reaction is the sum of all changes." (Libretext)

Compare the step reaction to the final reaction to see the similarity and differences. We may have to flip an equation or multiply it by a constant to obtain the number of moles of the species in the final equation. Just remember, whatever we do to the equation, we have to do to the ΔH as well.

3C  +  4H₂  →  C₃H₈      ΔH= +104 kJ  [1]

      C + O₂ → CO₂        ΔH= -394 kJ  [2]

  2H₂ + O₂ → 2H₂O      ΔH= -572 kJ  [3]

C₃H₈  + 5O₂  → 3CO₂ + 4H₂O  ΔH = ?

_____________________________________________

Compare the Equation

Equation [1]

In [1] the C₃H₈is on the product side. But the final equation has the C₃H₈ on the reactant side. Thus we have to flip the equation. This flips the sign of ΔH.

                C₃H₈   →   3C  +  4H₂     ΔH= - 104 kJ  [1]

Equation [2]

The CO₂ in the final equation is on the product side but is 3 moles. Thus we have to multiply [2] by three. The ΔH is also multiplied by 3.

               3C + 3O₂ → 3CO₂        ΔH= 3 (-394 kJ)    [2]

Equation [3]

The H₂O in the final equation has a coefficient of 4. Thus we have to multiply [3] by 2.

              4H₂ + 2O₂ → 4H₂O      ΔH= 2(-572 kJ)  [3]

Combine the Equations

Combine the newly sorted versions of the equation and simplify to see if it matches the final equation. We also add the ΔH.

⇒  C₃H₈ +  3C + 3O₂ + 4H₂ + 2O₂   →   3C  +  4H₂  + 3CO₂ + 4H₂O

              ΔH= - 104 kJ + 3 (-394 kJ) + 2(-572 kJ)

⇒   C₃H₈ +  + 5 O₂   →  3CO₂ + 4H₂O

              ΔH= - 104 kJ + 3 (-394 kJ) + 2(-572 kJ) = −2430 kJ

Answer: All of the above

Explanation:

All of the options are producers, meaning they make their own food from sunlight through the process of photosynthesis.

Answer:

By contracting, muscles pull on bones and allow the body to move. When you want to bend your elbow, your biceps muscle contracts, and, at the same time, the triceps muscle relaxes. The biceps is the flexor, and the triceps is the extensor of your elbow joint.

Explanation:

yeah, hope it helps a little. :)

Answer:

Mechanical Energy to Thermal Energy

When you strike a match, it moves through the air until it rubs against a surface. The rubbing produces the heat required to light the match. This is a transformation from mechanical energy to thermal (heat) energy.

Explanation:

Answer:

A is the answer.

Explanation:

Answer:

a. Stirring the solution.

Answer:

C hope it helps

Explanation:

Answer:

location A creates a volcano

Explanation:

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Answer:

M g ( s) + 2 H + ( a q) + 2 S O 4 2 − ( a q) -> M g 2 + ( a q) + 2 S O 4 2 − ( a q) + H 2 ( g) The reaction forms magnesium sulfate and hydrogen gas. As the sulfate is still aqueous on either side of the equation, we can leave it out of the ionic equation (it is a spectator ion).

Explanation:

The chemical equation of Magnesium and  sulfuric acid:

Mg  +  H₂SO₄  → MgSO₄ +   H₂

A chemical equation can be described as the equation of a chemical reaction involving substances. An equation consists of reactants contributing, formed products, and an arrow to indicate a chemical reaction.

The balanced equation of a reaction involving an equal number of atoms of substances on either side of the equation is known as a balanced chemical equation.

The law of conservation of mass will be followed by such an equation. By obeying this law, the total mass of the reactants as well as products should be equal in a balanced chemical equation.

Given the reaction of Magnesium metal placed in sulfuric acid. The solution starts to bubble as there is the formation of hydrogen gas.

Mg  +  H₂SO₄  → MgSO₄ +   H₂

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Answer: IV

Explanation:

Atoms with the same number of valence electrons (in this case 2) will have similar chemical properties.

Light bulbs emit photons to produce light. Photons are packets of electromagnetic energy, and when an electric current passes through the filament of a light bulb, it heats up and produces light. Option D is correct.

When an electric current passes through the filament of a light bulb, the filament gets heated up due to the resistance of the material. This heating process causes the filament to become incandescent, meaning it emits light as a result of being heated to a high temperature.

The emitted light consists of photons, which are particles of electromagnetic energy. These photons carry the energy released from the heated filament in the form of electromagnetic waves, resulting in the visible light that illuminates the surrounding area. Protons, electrons, and neutrons are subatomic particles and are not involved in the process of emitting light in a light bulb.

Hence, D. is the correct option.

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--The given question is incomplete, the complete question is

"What do light bulbs emit to produce light? Group of answer choices A) protons B) electrons C) neutrons D) photons."--