All categories

2 years ago

Which electron configuration represents a selenium atom in an excited state?(1) 2-7-18-6(2) 2-7-18-7(3) 2-8-18-6(4) 2-8-18-7

1 answer:

5 0

(2) 2 - 7 - 18 - 7 does, because the electron from the L shell jumped to the N shell, which requires energy.

The rest of them are either different types of atoms (different elements) or are not the excited state (ground state)

You might be interested in

If earth is 1.50 x 10^8km from the sun what is the distance in Mm?

Readme [11.4K]

The distance of the earth to the sun in Mm = 1.5 x 10⁵

<h3>Further explanation</h3>

Given

The distance of the earth to the sun : 1.50 x 10⁸ km

Required

The distance in Mm

Solution

In converting units we must pay attention to the conversion factor.

the conversion factor :

1 kilometer(km) = 10⁻³ megameter(Mm)

So the distance conversion :

1.5 x 10⁸ x 10⁻³ = 1.5 x 10⁵ Mm

8 0

3 years ago

the valence electrons of metals jump easily to a higher energy orbital when light shines on them then they all fall emiting the

Lelechka [254]

Answer:

Lustrous

Explanation:

Metals are lustrous which gives them a property of having Shiny surfaces

7 0

2 years ago

The primary metallic element that's added to steel to make stainless steel is

iogann1982 [59]

The answer is D. Stainless steel is made up of the metals, chromium, nickel, among others like aluminum and silicone.

6 0

3 years ago

.<br> You should be able to<br> these groups on the periodic table, and know their<br> properties.

klasskru [66]

Answer:

The vertical columns on the periodic table are called groups or families because of their similar chemical behavior. All the members of a family of elements have the same number of valence electrons and similar chemical properties.

Explanation:

<h3>I HOPE NAKATULONG PO AKO:)</h3><h2>PA BRAINLEST NLNG PO SANA:(</h2>

4 0

3 years ago

Please help me out thank you so much

aleksandrvk [35]

Answer:

a) 1.567 x 10^9

b) 2.36 x 10^(-5)

6 0

2 years ago