How do you calculate mass using density and volume??

The ionization energies of rubidium and silver are 4.18 and 7.57 eV, respectively. Calculate the ionization energies of an H ato

Artist 52 [7]

Answer:

0.544 eV; Ag is a smaller atom.

Explanation:

1. Ionization energy of hydrogen

The outermost electrons in Rb and Ag are in 5s orbitals.

The formula for the energy of an electron in a hydrogen atom is

E = -13.6/n² eV

For a hydrogen atom in a 5s orbital,

E = -13.6/5² = -13.6/25 = -0.544 eV

The ionization energy would be 0.544 eV.

2. Rb vs Ag

The first electrons to be removed from Rb and Ag are in 5s orbitals.

The atomic radius of Ag is less than that of Rb because, as you go from left to right across the Row, you are adding 10 protons to the nucleus and 10 electrons to the outer shell.

The added electrons do not effectively shield each other from the attraction of the nucleus, so the 5s electron of Ag is closer in.

It takes more energy to remove the electron from silver, so the ionization energy of Ag is greater than that of Rb.

4 0

3 years ago

Why does metal need to be extracted from an ore before it can be used?

Hunter-Best [27]

Metal ore has other elements in it as well. Also sediment and stone might cover the ore. We don't want to have a phone with sediment on it do we? thus these few reasons are why.

7 0

3 years ago

Methionine, ch3sch2ch2ch(nh2)co2h, is an amino acid found in proteins. draw a lewis structure of this compound. what is the hybr

Evgesh-ka [11]

hybridization is defined as mixing up of the atomic orbital with nearly same energies according to linear combination of atomic orbitals. the orbitals formed are equal in energy and are called hybrid orbitals .

6 0

3 years ago

Write the structure of a D-aldohexose that gives a meso compound on treatment with NaBH4 in water.

soldier1979 [14.2K]

Explanation:

Meso compounds are optically inactive stereoisomers. Despite of having chiral carbon, they do not show optical activity because it has a plane of symmetry in its structure itself. It is superposable on its mirror image.

Aldo sugars on reaction which reducing agents such as , NaBH₄ reduces the carbonyl group in the sugar to alcohol and gives corresponding alditol.

<u>The D- aldohexose which on reduction gives a meso alditol are allose and galactose. </u>

<u>The structure is shown in the image below. Thus, in allitol and galactitol formed have internal plane of symmetry which makes the optically inactive.</u>

7 0

3 years ago

Scientists developed a device capable of lowering temperatures in order to slow molecular motion to almost a complete stop. Whic

seropon [69]

Answer:

273k

Explanation:

Soooo... This is a complicated problem.

I dunno. Like... Is this a trick question? Trivia, maybe?

Nahhhhh...

It's just not telling us facts...SOME facts, but we need to use past learning to help us.

FIRST of all, what the heck does K even mean?

Is this a memo? A demo? A KO?

Okay, it's nither of these things.

So, let me tell you what the "K" means.

The K means "Kelvin" which is basically a word form for "-"

I AM NOT MAKING A FACE. IT'S THE WORD FORM FOR MINUS. STOP LAUGHING!!!!

And so... To bring objects to a COMPLEETE SKRRRRRRRRRRRRRRRRRRRRRRT...

It will need to be -273.

This means that the answer is 273k.

Which reminds me, Ima play 2k.

And ima rap to-day.

And now I'm being lame.

Just answer the question :/

3 0

3 years ago