Chemistry, 17.03.2021 23:40 ozheng24112

How do the isotopes hydrogen-1 and hydrogen-2 differ? Hydrogen-2 has one neutron; hydrogen-1 has none.

Hydrogen-2 has one proton; hydrogen-1 has none.

Hydrogen-2 has one more electron than hydrogen-1.

Hydrogen-2 has two protons; hydrogen-1 has one.

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Answer from: Quest

en el barco… .. ¿donde comes? yo como en el comedor del barco

¿qué estás comiendo? estoy comiendo arroz con pollo.

¿que hay en la mesa? en la mesa hay muchos platos y un bonito juego de cubiertos.

¿qué haces en el club de la juventud? me junto con mis amigos y jugamos cartas hasta tarde.

¿qué haces en la piscina? en la piscina, nado con mis amigos.

¿estabas dormido? no, estaba leyendo una revista.

¿qué ves en el teatro? en el teatro veo una obra de lope de vega.

a que hora vives hoy. this is illogical because it means what time do you live today? it should be: ¿ a qué hora vienes hoy? hoy vengo a las 4 de la tarde.

¿a qué hora en el verano? en el verano vengo más temprano.

¿qué llevas puesto hoy? hoy llevo puesto un polo y unos pantalones negros.

¿qué te pones cuando vas a la escuela? me pongo un uniforme y zapatos negros.

¿a dónde vas hoy? hoy voy al cine.

¿mañana? en el barco. mañana voy al gimnasio.

Answer from: Quest

assuming that your periodic table has eighteen columns, you should highlight the four elements in the third column from the left of the table.

explanation

neutral atoms of elements after calcium contain d electrons. the energy of d orbitals of a particular main shell lies between the energy of the s and p orbitals of the next main shell. for example, electrons in the $3d$ have energy higher than those in the $4 s$ orbital while lower than those of the $4 p$ orbital.

by the aufbau principle, electrons fill orbitals one at a time, starting from those of the lowest energy. the $4s$ orbital is therefore filled right after $3p$ orbitals and before $3 d$ orbitals.

potassium has electron configuration $[\text{ar}] 4 s^{1}$ and calcium $[\text{ar}] 4 s^{2}$ . the s orbital of a main shell holds a maximum of two electrons. the next element would thus have the electron configuration $[\text{ar}] 4 s^{2} \; 3d^{1}$ and satisfy the requirements.

a neutral atom of the element contains three electrons on top of the most recent noble gas element. it should thus be placed in the third column of the periodic table. both scandium and yttrium would satisfy the conditions. an aufbau diagram indicates that the 4f orbital is filled before the 5d. however, it appears that exceptions exists for both lanthanum and actinium. neutral atoms of the two d-block elements also demonstrate the $ns^{2} \; (n-1) p^{1}$ and should be highlighted as well.

Answer from: Quest

Woah that’s a lot to read xd i’ll try though. i’ll get back t you if. i know the andwer

Answer from: Quest

може ли да зареждате повече информация, моля

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How do the isotopes hydrogen-1 and hydrogen-2 differ? Hydrogen-2 has one neutron; hydrogen-1 has no...

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