All categories

3 years ago

What is the atomic nucleus made of ?

Chemistry

2 answers:

Tasya [4]3 years ago

8 0

The atomic nucleus is made of Nucleons

oksian1 [2.3K]3 years ago

4 0

Answer: nucleons

Explanation:

The nucleons are the particles that constitue the nuclei of the atoms. Those are protons and neutrons.

They are not elementary particles (quarks are the elementary particles that form both protons and neutrons).

Protons are the particles that define the elements. Any different elements have different number of protons. H has one proton, He has 2 protons, Li has three protons, Na has 11 protons, U has 92 protons.

Protons are positively charged and the number of protons in any neutral atom is equal to the number of electrons (the electrons, which are elementary negatively charged particles, are around the nucleous).

Neutrons have not charge and are responsible for the stability of the nuclei. They are fundamental to avoid that the repulsion forces between the positively charged protons ends causing the collapse of the nuclei.

You might be interested in

For an assignment, Alexis has to write a scientific question. She writes, "How much money should be spent to research brain canc

Andru [333]

Answer:

D will brain cancer eventually be curable?

Explanation:

3 0

4 years ago

Which of the following is formed when an acid reacts with a base? (1 point)

timurjin [86]

Answer:

Probably Alkaline

Explanation:

Not sure at all.

6 0

3 years ago

Read 2 more answers

a spherical sample has a mass of 2.813g. it has a diameter of 8.0mm. what is the sphere made of (determined by its density as g/

blondinia [14]

To determine the density, we use the following formula:

$density= \frac{mass}{volume}$

mass= 2.813 grams
volume= ?

we need to first calculate the volume before we can solve for the density. since the question states that the sample has a spherical shape, we can use the volume formula of spheres to find it.

$Sphere_{volume}= \frac{4}{3} \pi r^{3}$

radius (r)= $\frac{diameter}{2}$ = $\frac{8.0 mm}{2} = 4.0 mm$

let's plug in the values

V= $\frac{4}{3} \pi 4^{3} = 268 mm^3$

we need to change the $mm^3$ to $cm^3$ using the following conversion

1 cm= 10 mm
$268 mm^3 (\frac{1 cm}{10 mm} )^3 = 0.268 cm^3$

now we can find the density.

density= 2.813 grams/ 0.268 cm= 10.5 g/cm3

5 0

3 years ago

A balloon filled with helium has a volume of 30.0 L at a pressure of 100 kPa and a temperature of 15.0°C. What will the volume o

Sholpan [36]

Answer:

$V_2=20.1L$

Explanation:

Hello there!

In this case, since this is a problem in which the pressure of the gas remains constant, we can use the Charles' law as a directly proportional relationship between temperature (in Kelvins) and volume given by:

$\frac{V_2}{T_2} =\frac{V_1}{T_1}$

Thus, solving for the final volume as the temperature is decreased to -80.00 °C, we obtain:

$V_2=\frac{V_1T_2}{T_1}$

$V_2=\frac{30.0L*(-80+273)K}{(15+273)K} \\\\V_2=20.1L$

Best regards!

4 0

3 years ago

1. (NH)2CrO-

Alex777 [14]

Question:

1. (NH)2CrO

a) Number of moles of H:

b) Number of moles of N:

Answer:

a) Number of moles of H: 2

b) Number of moles of N: 2

Explanation:

The $(NH)_2CrO$ is ammonium Chromate which is monoclinic and yellow Crystal that is formed due to the reaction of ammonium Hydroxide and ammonium di-chromate. It is used as catalyst, corrosion inhibitor as well as analytical inhibitors.