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MatroZZZ [7]
3 years ago
5

Which ion has the same electron configuration as an atom of He?

Chemistry
2 answers:
pychu [463]3 years ago
6 0
It's H- since He has only 2 electron and so does H-
mariarad [96]3 years ago
3 0

Answer;

H- (negatively charged hydrogen ion)

Explanation;

The hydrogen ion has the same electron configuration as an atom of Helium. -Hydrogen ion is formed when a hydrogen atom loses or gains an electron. A positively charged ion is formed when hydrogen atom loses an electron (remaining with zero electrons) while a negatively charged ion (H-) is formed when a hydrogen atom gains an electron thus having 2 electrons.

-Helium atom has two electrons, therefore, it is similar with an negatively charged hydrogen.

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When CaCl2 and Zn react together, zinc (Zn) can replace chlorine (Cl) in the compound because zinc is higher on the periodic tab
Phantasy [73]

Answer:

The answer to your question is: false

Explanation:

Zinc is a metal, Chlorine is a nonmetal, Zinc can replace another metal not a non metal.

3 0
3 years ago
Read 2 more answers
The photon of light that is emitted as an electron drops back to its original orbit is:
Alex73 [517]

Answer:

energy

Explanation:

The photon of light that is emitted as an electron drops back to its original orbit is energy and this energy is released during de-excitation process.

The electron is jumped into higher level and back into lower level by absorbing and releasing the energy.

The process is called excitation and de-excitation.

Excitation:

When the energy is provided to the atom the electrons by absorbing the energy jump to the higher energy levels. This process is called excitation. The amount of energy absorbed by the electron is exactly equal to the energy difference of orbits.  For example if electron jumped from K to L it must absorbed the energy which is equal the energy difference of these two level. The excited electron thus move back to lower energy level which is K by releasing the energy because electron can not stay longer in higher energy level and comes to ground state.

De-excitation:

When the excited electron fall back to the lower energy levels the energy is released in the form of radiations. this energy is exactly equal to the energy difference between the orbits. The characteristics bright colors are due to the these emitted radiations. These emitted radiations can be seen if they are fall in the visible region of spectrum

3 0
3 years ago
What is called mother liquor in a chemistry lab?
Paladinen [302]
The mother liquor<span> is the part of a solution that is left over after it crystallizes.  An example of a place you could find this is in sugar refinement.</span>
7 0
3 years ago
Density of 30.00 mL of H2O
ohaa [14]

its not possible sorry

6 0
3 years ago
Can someone help me with this please
never [62]

Answer: B. 1:2

Explanation: Beryllium and chlorine forms a binary ionic compound. Ionic compound is formed when a metal loses its electrons to a receiving non metal. Beryllium (metal) has two valence electrons while chlorine (nonmetal) has seven valence electrons, and so a beryllium atom has to give out its two valence electrons to attain a duplet stable structure while a chlorine atom will gain one electron to attain its stable octet structure. In the reaction between beryllium and chlorine, two atoms of chlorine have to accept the two electrons from one beryllium atom to attain their stable octet structure.

The formula of the compound formed is BeCl2.

3 0
4 years ago
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