Use the periodic table to answer the questions below.

Chemistry

2 answers:

MrRa [10]2 years ago

4 0

Answer:

Second option.

Explanation:

Nitrogen is the first element of group 15, and its number atomic is 7, so, in its neutral state, it has 7 electrons.

By Linus Pauling diagram (see figure), the electronic distribution will be:

$1s^{2} 2s^{2} 2p^{3}$

The distribution follows the arrows, from the less energetic subshell for the most energetic one. The subshell s has an only magnetic number, so only one orbital to put electrons. Subshell p has 3 magnetic numbers, so 3 orbitals to put electrons.

To put the electrons, we have to follow Hund's Rule: fulfill the orbitals which only one spin, until all orbitals have this spin, so continue, with the other spin, until finishing the electrons on that subshell. Spin is the rotation of the electron, and it can be +1/2 or -1/2.

So, for subshell 2p, how there are only 3 electrons, all three will be put with the same spin (+1/2, up arrow). If there was one more electron, it would be filled in the first orbital with the spin -1/2, down arrow.

Romashka-Z-Leto [24]2 years ago

3 0

B ............ is the answer,

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What is the relative mass of the electron?

DerKrebs [107]

Answer:

The relative mass of electron is 0.0005

Explanation:

Atoms are the fundamental unit of matter. Every thing in the universe that occupy space and have mass is called matter. we can say that every matter is composed of atoms. while the atom is composed of subatomic particles called electron proton and neutron.

Subatomic particles Relative charge Relative mass

Proton +1 1

Neutron 0 1

Electron -1 0.0005

Electron:

The electron is subatomic particle that revolve around outside the nucleus and has negligible mass. It has a negative charge.

Symbol = e⁻

Mass= 9.10938356×10⁻³¹ Kg

electrical charge on electron= -1.6022 × 10⁻¹⁹ C

It was discovered by j. j. Thomson in 1897 during the study of cathode ray properties.

Proton and Neutron:

An atom consist of positively charged central core (nucleus) that is made up of Proton and neutron. Proton has positive charge while neutron is electrically neutral. Proton is discovered by Rutherford while neutron is discovered by James Chadwick in 1932.

Symbol of proton= P⁺

electrical charge on proton= +1.6022 × 10⁻¹⁹ C

Mass of proton=1.672623×10⁻²⁷ Kg

Symbol of neutron= n⁰

Mass of neutron=1.674929×10⁻²⁷ Kg

electrical charge on neutron= 0

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3 years ago

At what height the acceleration due to gravity of the earth become half ?

Serggg [28]

Answer:

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