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3 years ago

An atom has 5 protons, 4 electrons, and 5 neutrons. Which

Chemistry

2 answers:

ololo11 [35]3 years ago

8 0

Answer:

B ) The atom has 4 electrons, just like every atom of boron

Explanation:

Likurg_2 [28]3 years ago

3 0

Answer:

i think the answer is C

Explanation:

not sure plsss dont bash im a beginner

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N which block of the periodic table is uranium (U) found?

hram777 [196]

Found in the D block

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3 years ago

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The top of the plate where food is placed is called:

Murrr4er [49]

Answer:

Design Shape

Explanation:

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3 years ago

The atomic number of polassium and

never [62]

Explanation:

Atomic radius decreases from left to right in a period.

Therefore Calcium would have a smaller atomic size.

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3 years ago

En la electrólisis del Cloruro de plomo se han depositado 2.6 gramos del metal en 20 minutos el peso atómico del plomo es 206 ca

mart [117]

Answer:

2.01 A

Explanation:

Para esta pregunta debemos empezar por la semi-reaccion del plomo:

$Pb^+^2~_(_a_q_)~+~2e^-~->~Pb_(_s_)$

Se intercambian dos electrones en la semi-reacción del plomo. Si tenemos en cuenta la ecuación:

$n=\frac{I*t}{z*F}$

Donde:

n= Moles depositados 

I= Intensidad de corriente (en Amperios)

z= Numero de electrones intercambiados

F= Constante de faraday = 96484 C/mol

t=tiempo (en segundos)

Que conocemos de esta ecuación?

Los moles (se pueden calcular a partir de la masa atómica del plomo, 207.2 g/mol)

$2.6~g~Pb\frac{1~mol~Pb}{207.2~g~Pb}=0.0125~mol~Pb$

El tiempo (hay que convertirlo a segundos):

$20~min\frac{60~s}{1~min}=1200~s$

Z (Numero de electrones)

De acuerdo a la semi-reacción son intercambiados 2 electrones.

Por lo tanto podemos resolver para "I":

$I=\frac{n*z*F}{t}=\frac{0.0125~mol*2*96484\frac{C}{mol}}{1200~s}$

$I~=~2.01~\frac{C}{s}=2.01~A$

Espero que sea de ayuda!

6 0

3 years ago

1. Please label the following compounds as

Wittaler [7]

Answer:

A NaCl: ionic (Na is metal and Cl is not metal)

B. AIC13: ionic (Al is metal and Cl is not metal)

C. C2H3N: covalent (C, H and N are nonmetals)

D. C3H60: covalent (C and H are nonmetals)

E. BaCl2: ionic (Ba is metal and Cl is not metal)

F. CaCl2: ionic (Ca is metal and Cl is nonmetal)

Explanation:

In ionic bonds, they are formed when there is a difference in electronegativity, between metals and nonmetals. In the case of covalent bonds, one or more pairs of electrons are shared between nonmetal compounds.

4 0

4 years ago