I don\'t know which question is wrong for #1 I put A ,C for #2 B & D # 3 i put A

Question

I don't know which question is wrong for #1 I put A ,C for #2 B & D # 3 i put A # 4 I put B and #5 Put D which one did I get wrong ? and why

Question 1 of 5

Question 2 of 5

1s22s22p63s23p64s2

1s22s22p63s2

1s22s22p6

[Ne]3s2

Question 3 of 5

3.8 x 10 -19 J and 4.1 x 10 -19 J

2.6 x 10 -18 J and 2.4 x 10 -18 J

2.6 x 10 18 J and 2.4 x 10 18 J

Question 4 of 5

Question 5 of 5

Question 1 of 5

1.0 Points Which choice best describes/illustrates wave-particle duality? A. The double slit experiment using electrons B. An ocean C. The double slit experiment using light D. An observed photon E. An observed electron

Question 2 of 5

1.0 Points Which of the answers below represents the full and condensed electron configurations for magnesium ion. A.

1s22s22p63s23p64s2

B.

1s22s22p63s2

C.

1s22s22p6

D.

[Ne]3s2

E. [Ne]

Question 3 of 5

1.0 Points In astronomy metallicity is the ratio of iron to hydrogen content in a star. Astronomers use the spectral line data from the electrons in iron and hydrogen to measure this. Iron is observed having a signature wavelength of 527 nm and hydrogen a signature wavelength of 486 nm (FYI: there are many more lines in the series that can be observed, especially for iron). Please give me the expected energies for these two photons A.

3.8 x 10 -19 J and 4.1 x 10 -19 J

B.

2.6 x 10 -18 J and 2.4 x 10 -18 J

C.

2.6 x 10 18 J and 2.4 x 10 18 J

D. 26 kJ and 34 kJ E. None are correct

Question 4 of 5

1.0 Points What is the principle reason electrons will fill the 1s orbital before filling the 2s orbital? A. Electrons prefer higher energy states B. The 1s is lower in energy than the 2s C. Electron spin state plays a role D. Each electron has varying translational motion E. None of the answers listed are appropriate

Question 5 of 5

1.0 Points Neon lights are everywhere! What best describes why neon (a non-reactive gas) can generate light when an electrical current is introduced? A. Electrons travel faster in neon lights B. Protons jump into another orbital and fall back into the nucleus C. The 80's gave neon the courage to light up D. Electrons are excited to a higher energy state and subsequently relax E. None are correct

Explanation / Answer

The second question answer is wrong because he asked for condensed magnesium ion configuration so it is Mg+2 that mean only ten electrons are presented in the atom so the configuration should be like this

1s[2]2s[2]2p[6] = Ne [neon]

so answer is B And E .

And I didn't find any wrongs in remaining questions.

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