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Rashid [163]
3 years ago
13

What is the name given to the electrons in the highest occupied energy level of an atom? -anions -cations -valence electrons -or

bital electrons
Chemistry
1 answer:
Serhud [2]3 years ago
5 0

Answer:

i know the answer the answer is valence electrons.

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SE LES DARA EL NUMERO ATOMICO DEBERAN REALIZAR LA CONFIGURACION ELECTRONICA ESCRIBE SU NOMBRE SIMBOLO Y UBICACION EN LA TABLA PE
IrinaK [193]

Answer:

Zinc, Cerio, Talio, Cloro y Criptón.

Explicación:

El zinc es el elemento que tiene el número atómico 30 y su símbolo es Zn. Se encuentra en el grupo 2B de la tabla periódica. El cerio es el elemento que tiene el número atómico 58 y su símbolo es Ce. Se encuentra en el grupo de lantánidos de la tabla periódica. El talio es el elemento que tiene el número atómico 81 y su símbolo es Tl. Se encuentra en el tercer grupo de la tabla periódica. El cloro es el elemento que tiene el número atómico 17 y su símbolo es Cl. Se encuentra en el séptimo grupo de la tabla periódica. El criptón es el elemento que tiene el número atómico 36 y su símbolo es Kr. Se encuentra en el grupo de gases nobles, es decir, en la tabla periódica del octavo grupo.

4 0
3 years ago
In the lab, you are thirsty and would like a drink. Can you use the beaker as a cup?
RideAnS [48]

No you can’t do that, that’s idiotic

6 0
3 years ago
Which of the following observations indicates that an atom has neutrons? (5 points)
finlep [7]
Please link those observations so we can answer your question. have a good day <3
8 0
2 years ago
Calculate the pH at the equivalence point in the titration of 35.0 mL of 0.125 M methylamine (Kb = 4.4 × 10−4) with 0.250 M HCl.
Sergeeva-Olga [200]

Reaction of methyl amine with HCl (H+) is:

CH3NH2 + H⁺  ↔ CH3NH3⁺

At equivalence point:

moles of CH3NH2 = moles of HCl

moles of CH3NH2 = 0.350 * 0.125 = 0.0438 moles = moles of HCl

Volume of HCl = 0.0438 / 0.250 = 0.1752 L

Therefore, total volume at eq point = 0.350 + 0.1752 = 0.5252 L

Now, at equivalence point there is 0.0438 moles of CH3NH3+. The new equilibrium is :-

CH3NH3+ ↔ CH3NH2 + H+

where the concentration of CH3NH3+ = 0.0438/0.5252 = 0.083 M

Ka = [CH3NH2][H+]/[CH3NH3+]

Kw/Kb = x²/0.083-x

10⁻¹⁴/4.4*10⁻⁴ = x²/0.083-x

therefore x = [H+] = 1.37*10⁻⁶M

pH = -log[H+] = -log[1.37*10⁻⁶] = 5.86


8 0
3 years ago
Molecular formula of a certain ionic compound is XY2 and X is a metal. State group to which elements X and Y belong to in the pe
emmasim [6.3K]

Answer: m Most likely Group2 metals and Group 17 non-ktta                                                                

Explanation:

A little more information is needed to be certain, but the likely answer is that X belongs to Group 2 and Y belongs to Group 17.  Group 2 metals (Be, Mg, Ca, Sr, Ba, etc.) are all divalent.  They gave rive up 2 electrons each to return to a full shell.  Group 17 elements (e,g, F, Cl, Br, I, etc.) all require 1 electron to reach a full valence shell.  That would make the proportion 1X to 2Y, or XY2.  It is possible that a metal outside of Group 2 would also have a valency of 2.  Iron(II) forms FeCl2, for example.

3 0
3 years ago
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