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Vlad [161]
3 years ago
6

When an atom is in the ground state what must happen for the atom to be in an excited state? what must happen for this atom to r

eturn to the ground state?
Chemistry
1 answer:
scoray [572]3 years ago
4 0
Hi there

In order for an electron to jump into a higher energy state, it must first absorb energy (heat, light, etc).

When an electron goes back down to the ground state from the excited state, it emits energy usually in the form of a photon.

i hope this helps

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A hardware salesman measures the mass of a box containing
sattari [20]

Step 1

<u>find the mass of a single washer</u>

Divide the total mass by the number of washers

\frac{0.4168}{1000} =0.0004168\ Kg

0.0004168kg=4.168*10^{-4} kg

Step 2

<u>Convert kg to mg</u>

we know that

1 kg=1*10^{6} mg

so

4.168*10^{-4}*10^{6} =4.168*10^{2}mg=416.8 mg

therefore

<u>the answer is</u>

416.8 mg

8 0
3 years ago
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How does adding salt to water affect the freezing point
melamori03 [73]
Salt makes the freezing point of water decrease, so it would freeze at a warmer temperature than regular water
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An electron in the hydrogen atom makes a transition from an energy state of principal quantum number ni to the n = 2 state. If t
topjm [15]

Answer:

\boxed{3}

Explanation:

The Rydberg equation gives the wavelength λ for the transitions:

\dfrac{1}{\lambda} = R \left ( \dfrac{1}{n_{i}^{2}} - \dfrac{1}{n_{f}^{2}} \right )

where

R= the Rydberg constant (1.0974 ×10⁷ m⁻¹) and

\text{$n_{i}$ and $n_{f}$ are the numbers of the energy levels}

Data:

n_{f} = 2

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Calculation:  

\begin{array}{rcl}\dfrac{1}{657 \times 10^{-9}} & = & 1.0974 \times 10^{7}\left ( \dfrac{1}{2^{2}} - \dfrac{1}{n_{f}^{2}} \right )\\\\1.522 \times 10^{6} &= &1.0974\times10^{7}\left(\dfrac{1}{4} - \dfrac{1}{n_{f}^{2}} \right )\\\\0.1387 & = &\dfrac{1}{4} - \dfrac{1}{n_{f}^{2}} \\\\-0.1113 & = & -\dfrac{1}{n_{f}^{2}} \\\\n_{f}^{2} & = & \dfrac{1}{0.1113}\\\\n_{f}^{2} & = & 8.98\\n_{f} & = & 2.997 \approx \mathbf{3}\\\end{array}\\\text{The value of $n_{i}$ is }\boxed{\mathbf{3}}

7 0
3 years ago
Help please, wavelengths!:)
meriva
Answer b) a to c would be considered one wavelength.
3 0
3 years ago
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A reaction will most likely occur if the colliding particles have the proper
fenix001 [56]
Answer: a rection will most likely occur if the colliding partilces have the proper orientation and energy.


The reactions occur becasue the molecules collide.


But not all the collisions result in a reaction.


The collisions have to meet some requirements.


Two of the basic requirements is that the collision has enough energy to overcome the activation energy and that the molecules collide in the riight way.


When two molecules react it is necessary that one element of one of the molecules interact when a specific element or group in the other molecule. That is the orientation must be the right one.


Collisions that to not have the proper orientation or enough energy will not cause reaction (changes in the bonds of the molecules). 
4 0
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