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Semmy [17]
2 years ago
9

What are chemical symbols and chemical formulas used for

Chemistry
1 answer:
lozanna [386]2 years ago
4 0

Answer:

chemicals symbols are used for abbreviating the name of the element/chemical  while chemicals formulas tell you how much of each element are in each chemical atom

Explanation:

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Properties describe matter phsical or chemical<br>​
Wewaii [24]

Answer:

Properties describe physical matter.

Explanation:

6 0
3 years ago
Read 2 more answers
If I combine atoms then I must be performing which process?
Evgesh-ka [11]
The answer is fusion. hope this helps!
6 0
2 years ago
Read 2 more answers
Effective nuclear charge, Zeff, is defined as:
Alborosie

Answer:

The effective nuclear charge for a valence electron in oxygen atom: Z_{eff} = 4.55

Explanation:

Effective nuclear charge  [Z_{eff}] is the net nuclear charge experienced by the electron in a given atom. It is always less than the actual charge of the nucleus [Z], due to shielding by electrons in the inner shells.

<em>It is equal to the difference between the actual nuclear charge or the atomic number (Z) and the shielding constant (s).  </em>

\Rightarrow Z_{eff} = Z - s

<u>For an oxygen atom</u>-

Electron configuration: (1s²) (2s² 2p⁴)

<em>The atomic number (actual nuclear charge): </em>Z = 8

The shielding constant (s) for a valence electron can be calculated by using the Slater's rules:

⇒ s = 5 × 0.35 + 2 × 0.85 = 1.75 + 1.7 = 3.45

<u><em>Therefore, the effective nuclear charge for a valence electron in oxygen atom is:</em></u>

Z_{eff} = Z - s = 8 - 3.45 = 4.55

<u>Therefore, the effective nuclear charge for a valence electron in oxygen atom:</u> Z_{eff} = 4.55

6 0
2 years ago
What is the density of an<br> object that has a mass of<br> 120 g and volume of 5 ml?
Viktor [21]

The density of an  object ρ = 24 g/ml

<h3>Further explanation</h3>

Given

mass of an object = 120 g

volume = 5 ml

Required

The density

Solution

Density is a quantity derived from the mass and volume  

Density is the ratio of mass per unit volume  

Density formula:  

\large {\boxed {\bold {\rho ~ = ~ \frac {m} {V}}}}

ρ = density  

m = mass  

v = volume  

Input the value :

ρ = 120 g : 5 ml

ρ = 24 g/ml

3 0
3 years ago
As the temperature of a reaction increases , it is expected that the reacting particles collide
Oxana [17]
It has been proven by Science that when the temperature of a reaction increases, the particles will gain energy and will collide faster and frequently.

Have a nice day! :)
6 0
3 years ago
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