Which city had the highest temperature
2 answers:
Which city had the highest temperature is Death Valley, California on July 10, 1913
<h3>Explanation: </h3>Temperature expresses hot and cold, and it measured with a thermometer. On the afternoon July 10, 1913, the US Weather Bureau recorded a high temperature of 134 °F (56.7 °C) at Furnace Creek in Death Valley. This temperature stands as the highest ambient air temperature recorded at the surface of the Earth, ever.
Death Valley is a desert valley in Eastern California. It is located in the northern Mojave Desert bordering the Great Basin Desert. Death Valley is one of the hottest places in the world along with deserts in the Middle East. Name "Death Valley" was given because its forbidding name by a group of pioneers lost here in the winter of 1849-1850
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QUESTION:- Which particle has a mass of 9.11 x 10^-28g and charge of -1?
OPTIONS:-
A. electron
B. proton
C. neutron
ANSWER:-
CHARGE ON PROTRON IS +1 AND IT HAS MASS OF SO IT CANNOT BE URE ANSWER
THERE IS NO CHARGE ON NEUTRON AND HAS MASS ALMOST EQUAL TO THE PROTON SO IT ALSO CANNOT BE URE ANSWER
MASS OF THE ELECTRON:-
CHARGE ON ELECTRON:-
SO URE ANSWER IS ELECTRON
Answer:
The required hybridization for a central atom that have:
a tetrahedral arrangement of electron pairs is
a trigonal planar arrangement of electron pairs is
a linear arrangement of electron pairs is
Explanation:
From the given information:
The required hybridization for a central atom that have:
a tetrahedral arrangement of electron pairs is
a trigonal planar arrangement of electron pairs is
a linear arrangement of electron pairs is
Hybridization is the mixing and blending of two or more pure atomic orbitals ( s, p and d) to forma two or more hybrid atomic orbitals that are identical in shape and energy e. sp ,sp² , sp³, sp³d hybrid orbitals.
Examples:
Tetrahedral
In CH₄ , carbon C is the central atom.
A 2s electron is excited from the ground state of boron 1s²2s²2p² to one of the empty orbitals to 2p to give the excited state 1s²2s²2p³.
In the excited state of carbon, the 2-s orbital can be mixed with the 2p orbitals in three ways : sp³, sp² and sp hybridization. For the formation of four sp³ hybrid orbitals, the 2s orbital are mixed with all the three p orbitals. The four sp³ hybrid orbitals are tetrahedrally arranged with a bond angle of 109.5⁰
Trigonal Planar
In BF₃ , Boron B is the central atom
A 2s electron is excited from the ground state of boron 1s²2s²2p¹ to one of the empty orbitals to 2p. The 2s orbital is then mixed with two orbitals of 2p to form three sp² hybrid orbitals that are trigonal planar arranged in the plane in order to minimize repulsion. They bonds between them form an equal strength and with bond angles of 120⁰
Linear arrangement:
In BeCl₂, Be is the central atom
To provide the unpaired electrons for covalent bonds a 2s electron is excited to a 2p orbital. Thereafter, the two atomic orbitals hybridize to give two identical orbitals called sp hybrid orbitals. The sigma bond for,ed are equal in bond lengths and form a bond angle of 180°