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4 years ago

What do lines in an elements line spectrum represent?

Chemistry

1 answer:

kodGreya [7K]4 years ago

3 0

Electron transfers between energy levels.

<h3>Explanation</h3>

An atom contains an infinite number of energy levels. An electron can exist within any one of them, but not in between. Electron can move from one level to another. However, those levels differ in energy. Energy has to conserve.

An electron loses energy when it moves to a level of lower energy. The energy is released as radiation. The frequency of the radiation depends on the energy difference. Those radiations combine to produce an emission spectrum.
An electron gains energy when it moves to a level of higher energy. This transfer happens only if there's an external source of energy. For example, directing a beam of white light on the atom. The beam of light would excite the electron. Again, the frequency of the radiation depends on the energy difference. Only frequencies that corresponds to transfer will be absorbed. Those radiation will eventually be released in all directions. As a result, strength of some of the radiations will be weakened. A continuous spectrum with those frequencies weakened is an absorption spectrum.

You might be interested in

1.) How do plant scientists hope to improve plant processes?

NISA [10]

Question:

1.) How do plant scientists hope to improve plant processes?

Answer:

January 2, 2012. Plant scientists long have known they can alter crops genetically to improve performance; they've been doing it thousands of years.

Question:

2.) How could you find out which resources are the most important for a plant to grow?

Answer:

Three elements, carbon, oxygen and hydrogen, are essential to plant growth and are supplied by air and water.

Hope it helps (^^)

# Cary on learning

6 0

3 years ago

Read 2 more answers

A 15.00g solid mixture containing Ca(OH)2, among other non-basic components, was neutralized with 0.2000g of HCl. What was the m

azamat

Answer:

1.373 wt% Ca(OH)₂

Explanation:

Sample mix = 15.0g

Ca(OH)₂(aq) + 2HCl(aq) => CaCl₂(aq) + 2H₂O(l)

moles HCl = 0.2000g / 36 g·mol⁻¹ 0.0056 mol

moles Ca(OH)₂ = 1/2(moles HCl) = 1/2(0.0056 mol) = 0.0028 mol

mass Ca(OH)₂ = 0.0028 mol ( 74 g/mol ) = 0.206 g

mass % Ca(OH)₂ = (0.206/15.0)100% = 1.373 wt%

3 0

3 years ago

You wish to calculate the mass of hydrogen gas that can be prepared from 4.93 g of srh2 and 4.14 g of h2o.

Ivenika [448]

The maximum amount of hydrogen gas that can be prepared is if all the hydrogen from both compounds is released.

The hydrogen in 4.94 g of SrH2 is calculated from the mass ratios between Sr and H

1) H2 in SrH2

Sr atomic mass = 87.62 g/mol

H2 molar mass = 2.02 g/mol

Mass of 1 mol of SrH2 = 87.62 g / mol + 2.02 g/mol = 89.64 g/mol

Ratio of H2 to SrH2 = 2.02 g H2 / 89.64 g SrH2

Proportion: 2.02 g H2 / 89.64 gSrH2 = x / 4.93 g SrH2

=> x = 4.93 g SrH2 * 2.02 g H2 / 89.64 g SrH2 = 0.111 g H2

2) H2 in H2O

2.02 g H2 / 18.02 g H2O * 4.14 g H2O = 0.464 g H2

3) Total mass of hydrogen = 0.111 g + 0.464 g = 0.575 g

Answer: 0.575 g

7 0

3 years ago

How many atoms are there in 5.7 mol of Li?

tatiyna

Answer:Answer:

5.8

, where

Avogadro's Number,

6.022

⋅

−

Explanation:

And

5.8

⋅

6.022

⋅

−

What is the mass of this quantity of lithium atoms? Hint, 1 mole has a mass of

6.94

⋅

Explanation:

i hope this helps

4 0

3 years ago

What are other materials found in the earth's crust

Kitty [74]

Answer:

From mud and clay to diamonds and coal, Earth's crust is composed of igneous, metamorphic, and sedimentary rocks. The most abundant rocks in the crust are igneous, which are formed by the cooling of magma. Earth's crust is rich in igneous rocks such as granite and basalt.

Explanation:

7 0

3 years ago