A neutral atom must have the same number of neutrons and electrons true or false

Answers

Answer 1

Answer: False .... A neutral atom needs the same number of protons and electrons

Related Questions

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The more particles a substance has at a given temperature, the more thermal energy is has. True or false?
How do you decide whether an observed property of matter is a physical or a chemical property?

The science of observing and forecasting weather conditions is called

Answers

Weather forecasting is the application of science and technology to predict the state of the atmosphere for a given location.

Answer:

Weather forecasting

Explanation:

Q4. Oil rigs are used to drill for crude oil.a. Drill heads are made from steel. Steel is an alloy.
Explain why Alloys are harder than pure metals.

b. Drill heads also contain diamonds.
Describe as fully as you can the structure and bonding in diamond.

c. Polymers are produced from crude oil.
Describe the structure and bonding in thermosoftening polymer and explain why thermosoftening polymers melt when heated.

Answers

a. Alloys are made up of 2 or more melted down metals to make 1 stronger metal
b. Drills use non pure diamonds that had carbon spots and because of this diamond (hardest mineral) is used on some drill heads to last longer
c. Everything in the world has a melting point of some degree some elements take 300° to melt while some can melt just from being in your hand

The figure shows a nutrition label. How much energy does this food contain?

Answers

Answer:

i need help with that too.

Explanation:

A solution contains 35 grams of KNO3 dissolved in 100 grams of water at 40°C. How much more KNO3 would have to be added to make it a saturated solution?(1) 29 g (3) 12 g
(2) 24 g (4) 4 g

Answers

A saturated solution is a solution that can not dissolve any more solute in it. The amount of potassium nitrate that can be dissolved to make a saturated solution is 29 gm.

What is solubility?

The capability of the solute to get dissolved in the solvent to form a saturated solution is called solubility.

The solubility of potassium nitrate in 100 gm of water at 40 degrees celsius is 64 gm. Hence, 64 gm of potassium nitrate is required in 100 gm of water to form a saturated solution.

In the question, the amount of potassium nitrate in 100gm water is 35 gm so, the amount of the potassium nitrate required more will be,

$64 - 35 = 29 \;\rm gm$

Therefore, option (1) 29 gm of potassium nitrate should be added more.

Learn more about solubility here:

brainly.com/question/19419801

The solubility of at 40 C is around 64 g in 100 g water ot 0.64 g KNO3 in 100 g water.

Therefore 64 g KNO3 in 100 g water is required for satured solution.

According to the problem there are 35 grams of KNO3 dissolved in 100 grams water

So we need 64 g-35 g= 29 g more KNO3

Hence the correct answer is 1

Solubility:

When the maximum amount of solute is dissolve in the solvent is called solubility. On the basic of solubility the solution are following types:

Saturate solution:

A solution which contains the maximum amount of dissolved solute at the equilibrium is called saturated solution.

Un-saturate solution:

A solution which contains lesser amount of solute as compare to saturated solution. It will be able to dissolver more solute.

Super -Saturate solution:

A solution which contains the more dissolved amount of solute as compare to saturated solution.

Aqueous solutions of this ion give a reddish precipitate when excess hydroxide ion is added.(A) Cu^{2+}
(B) CO₃^{2−}
(C) Fe^{3+}
(D) Al^{3+}
(E) Pb^{2+}

Answers

Fe ^3+ is the correct answer

Which formula represents a polar molecule?
(1) Br2 (3) CH4
(2) CO2 (4) NH3

Answers

$\boxed{\left( 4 \right){\text{ N}}{{\text{H}}_{\text{3}}}}$ represents a polar molecule.

Further Explanation:

The attraction between atoms, molecules or ions responsible for the formation of chemical compounds is a chemical bond. It is formed either due to electrostatic forces or by the sharing of electrons.

The bond that results from the complete transference of electrons between metals and non-metals is an ionic bond. Metals, being electropositive in nature, have the tendency to lose electrons whereas non-metals tend to gain electrons due to their high electronegativity. Cations are formed by metal atoms while non-metals form anions with the gain of electrons.

The bond formed by mutual sharing of electrons between bonded atoms is a covalent bond. Such bonds usually exist between two or more non-metals.

The polarity of a bond depends on the electronegativity difference between the bonded atoms. The more electronegative atom will attract electrons more towards itself, thereby developing negative charge on itself and leaving the less electronegative atom with positive charge. Symmetry also plays an important role to determine whether a molecule will be polar or not. If symmetry is present in a molecule it will be non-polar, even there is an electronegativity difference between the bonded atoms.

(1) ${\text{B}}{{\text{r}}_{\text{2}}}$

This is formed by the combination of two Br atoms so there is no electronegativity difference between the bonded atoms and therefore this molecule is non-polar in nature (For structure, refer to the attached image).

(2) ${\text{C}}{{\text{O}}_{\text{2}}}$

This molecule is composed of one carbon and two oxygen atoms but is symmetrical in nature so dipole moment gets cancelled out and therefore ${\text{C}}{{\text{O}}_{\text{2}}}$ is non-polar in nature (For structure, refer to the attached image).

(3) ${\text{C}}{{\text{H}}_{\text{4}}}$

This molecule consists of one carbon and four hydrogen atoms but is symmetrical in nature so dipole moment gets cancelled out and therefore ${\text{C}}{{\text{H}}_{\text{4}}}$ is non-polar in nature (For structure, refer to the attached image).

(4)

${\text{N}}{{\text{H}}_{\text{3}}}$

This molecule is composed of one nitrogen and three hydrogen atoms. But N is more electronegative than H so this is polar molecular due to electronegativity difference. Also, this is unsymmetrical molecule (For structure, refer to the attached image) and therefore it is polar in nature.

Learn more:

Identification of ionic bonding: brainly.com/question/1603987
Which is a covalent compound? brainly.com/question/2083444

Answer details:

Grade: High School

Subject: Chemistry

Chapter: Ionic and covalent compounds

Keywords: polar, non-polar, CH4, CO2, Br2, NH3, symmetrical, dipole moment, chemical bond, ionic bond, covalent bond.

4)NH3

NH3 is an asymmetrical molecule with a pyramidal shape.

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