Chemistry Middle School

describe the nucleus. what can be found inside the nucleus?

Describe The Nucleus. What Can Be Found Inside The Nucleus?

Answers

Answer 1
The nucleus is the positively charged central core of an atom, consisting of protons and neutrons and containing nearly all its mass.
Answer 2

The small, central core of an atom. The nucleus of an atom is made up of both  protons "positive charges" and neutrons "no charge."

Related Questions

two objects of different masses are sitting on a different balance scales. object A has a greater mass than object B how will the weights of the objects compare to each other?

Answers

A will be lower on the scale compared to b because it is heavier

Explanation:

Since it is given that object A has greater mass this means that object A is heavier than object B.

Therefore, when both object A and object B is placed on a balance scale on either side then the balance scale will move downwards on the side where object of heavier mass is placed.

That is, balance scale will be in downward direction where object A is placed. Whereas balance scale will move upwards where object B is placed.

Atoms can gain lose or share electrons durning a chemical change why doesn't this cause the atoms identities to change?

Answers

An atom's identity, that is, whether it is 'oxygen' or 'plutonium', for example, is determined solely by the number of protons in the nucleus. The number of neutrons also plays a part - a differing number of neutrons can change an atom from one isotope of an element into another, but the atoms would still remain the same element, albeit a different isotope. The number of electrons orbiting the atom does not change the identity of the atom, only it's electronic state. Take electrons away and it becomes a positively charged ion of the same element. Add electrons and it becomes a negatively charged ion, but still of the same element.

A certain ore is 29.9% nickel by mass. How many kilograms of this ore would you need to dig up to have 75.0 g of nickel?

Answers

75g ---- 29,9%
Xg ----- 100%
X = 7500/29,9
X = 250,836g :)
Final answer:

To obtain 75 g of nickel from an ore that is 29.9% nickel by mass, approximately 0.252 kilograms of the ore would be required.

Explanation:

This type of problem is a matter of conversion between the mass of the ore overall and the mass of the specific component, in this case, nickel. The ore is 29.9% nickel by mass, which means for every 100 g of ore, there are 29.9 g of nickel.

To find out how much ore is needed to yield 75 g of nickel, we can set up a proportion: (29.9 g nickel / 100 g ore) = (75 g nickel / x g ore).

Solving for x, we find x = (75 g nickel * 100 g ore) / 29.9 g nickel = approximately 251.67 g ore.

This is the mass of the ore required in grams. Since the question asks for the answer in kilograms, we will need to convert this to kg. Knowing that 1 kilogram = 1000 grams, we divide the answer by 1000 and find that approximately 0.252 kg of the ore would need to be dug up in order to have 75.0 g of nickel.

Learn more about Mass conversions in Chemistry here:

https://brainly.com/question/31389471

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Water has a density of 1.0 g/cm3. Glycerin, a liquid used in some soaps, has a density of 1.26 g/cm3. If an object sinks in water but floats at a constant depth in glycerin, its density is _____.
A. between 1.0 g/cm3 and 1.26 cm3
B.exactly 1.26 g/cm3
C.greater than 1.26 cm3
D.less than 1.0 g/cm3

Answers

For an object to sink in something, it's density has to be higher than the object it is in, so if it sinks in water the number has be higher than 1

And to float, and objects density has to be lower than that of the substance it is put in, so it has to be lower than 1.26

So between 1 and 1.26

Hello! Since the object will sink in the water that has a density as 1.0, then it obviously cannot be D. If it floats at the Glycerin level at 1.26, then it cannot be C. An object or a substance can float on the exact level of density as water or liquids. The answer is B. Exactly 1.26 g/cm3. I hope I helped! Please mark me brainliest if you find suitable! Have a fantastic day! :)

Evidence of a chemical change would be a ___________________. Question options: spinning top. rusting car fender. spilled bucket of water. melting popsicle.

Answers

The answer is the second option "rusting car fender." Hope this helps.
 (ﾉ◕ヮ◕)ﾉ*:･ﾟ✧

Object A has a mass of 10 g and a volume of 8 cm3. Object B has a mass of 10 g and a volume of 6 cm3. Which object has a greater density and by how much? Object A, by 2 grams per cubic centimeter Object A, by 0.42 gram per cubic centimeter Object B, by 2 grams per cubic centimeter Object B, by 0.42 gram per cubic centimeter

Answers

Mass of object A = 10g
volume of object A = 8cm³
Mass of object B = 10g
Volume of Object B = 6cm³
we use the following formula to calculate the density of object A and B.
Density = Mass / Volume
Density of Object A = 10g / 8cm³ = 1.25g/cm³
Density of Object B = 10g / 6cm³ =1.67 g/cm³
So the density of object B is greater than object A
and if we find the difference:
1.67 - 1.25 = 0.42
So the answer is; Object B, by 0.42 gram per cubic centimeter

It’s D honey, Object B, by 0.42 gram per cubic centimeter

carbon dioxide is a gas with the relative formula mass of 44. calculate the mass of the 36 dm3 of the CO2 at room temperature? ?? ANYONE WHO GET CHHEMISTY HELP

Answers

At STP 44g = 22.4 L Temp increases by 25 at room temp
Vol increases 298/273=1.09
New volume of 44g =24.45 L
36dm cubed=.036L
44g/24.45L=x/.036L
Should be 0.065g of CO2

Final answer:

The mass of 36 dm3 of CO2 at room temperature is 66.02 grams, calculated by first determining the number of moles and then multiplying by the molar mass of CO2.

Explanation:

To calculate the mass of 36 dm3 of CO2 at room temperature, we can use the molar volume of a gas at room temperature, which is approximately 24 dm3/mol. Given that the molar mass of CO2 is 44.01 g/mol, we can first find the number of moles of CO2 by dividing the volume by the molar volume.

Number of moles = Volume / Molar volume = 36 dm3 / 24 dm3/mol = 1.5 moles

Now, to find the mass, we multiply the number of moles by the molar mass of CO2.

Mass = Number of moles × Molar mass = 1.5 moles × 44.01 g/mol = 66.02 g CO2

___ Particles of which of the following have the greatest thermal energy

A. a liquid
B. a crystalline solid
C. a gas
D. an amorphous solid

Answers

Salutations!

___ Particles of which of the following have the greatest thermal energy

Gas is the particle that has the greatest thermal energy. Gas has the greatest thermal energy because the movement between particles is clump. This thermal energy is then converted into kinetic energy.

Thus, your answer is option C.

Hope I helped (:

Have a great day!

Which of these is an example of a chemical change? Fireworks exploding
grinding powder
melting cheese
ironing a shirt

Answers

fireworks exploding is the answer


Answer is B. Fireworks Exploding.

Explain whether nitrogen atoms will form bonds with other atoms

Answers

Yes, the nitrogen atoms will form bonds with other atoms is called covalent bonds, this is also called a molecular bond. This is a chemical bond that involves the sharing of electron pairs. When the process of sharing is occur is known as covalent bonding.
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