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3 years ago

What’s some facts about atoms and elements

Chemistry

2 answers:

Ilya [14]3 years ago

6 0

Answer:

There are alot of facts but here are a few

Explanation:

Atoms:

There are 3 parts to an atom

Protons have a positive electrical charge

Atoms are the smallest particles to make an element

Elements:

Hydrogen is the most common element in the world

An element is a substance that is made entirely from one type of atom.

An element is a substance that cannot be broken down into any other substance.

Contact [7]3 years ago

3 0

Answer:

Dmitri Mendeleyev is the inventor of the modern periodic table.

The majority of the elements are metals.

Atoms are made of tiny particles called protons, neutrons and electrons. Protons and neutrons clump together to form a central nucleus. The electrons move in a cloud-like region around the nucleus.

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When is potential energy transformed into kinetic energy

grin007 [14]

Kinetic energy is when an object is in motion
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Fiesta28 [93]

Complete Question

Questions Diagram is attached below

Answer:

* $W=1142.86Joule$

* $Q=997.7J$

* $H=2140.5J$

Explanation:

From the question we are told that:

Temperature $T=337K$

Pressure $P=(60-55)Pa*10^5$

Volume $V=(1.6-1.4)m^3*10^{-3}$

Generally the equation for gas Constant is mathematically given by

$\frac{P_2}{P_1}=\frac{V_1}{V_2}^n$

$\frac{55*10^5}{60*10^5}=\frac{1.4*10^{-3}}{1.6*10^{-3}}^n$

$n=0.65$

Therefore

Work-done

$W=\int{pdv}$

$W=\frac{55*10^5*1.6*10^{-3}*60*10^5*1.4*10^{-3}}{1-0.65}$

$W=1142.86Joule$

Generally the equation for internal energy is mathematically given by

$Q=mC_vdT\\\\Q=\frac{3*1*3.314*16}{1.4-1}$

$Q=997.7J$

Therefore

$H=Q+W$

$H=997.7J-11.42.9$

$H=2140.5J$

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2 years ago

What is the volume of 68.0 g of ether if the density of ether is 0.72 g/mL?

umka2103 [35]

Answer:

94.44

Explanation:

Volume is equal to Mass/Density so therefore, you do the mass which is 68.0 g/0.72 g/mL which is the density and get 94.44 mL because the g cancel each other out when it comes to the label!

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2 years ago

Of the elements calcium, Ca, beryllium, Be, barium, Ba, and strontium, Sr, which has the largest atomic radius? Explain your ans

Nezavi [6.7K]

The largest atomic radius has Ba,because they are all metals of 2nd group,but as you know when you go down upright in the periodic table the metallic features getting stronger but also orbital layers increasing,and you can say more layers larger atomic radius.Hope I helped,sorry for English

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