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ivann1987 [24]
3 years ago
14

Transition metal elements are in the "d block" on the periodic table, because the electron configuration of every transition met

al ends with electrons in "d" atomic orbitals. True False
Chemistry
2 answers:
goblinko [34]3 years ago
4 0
TRUE :) ;D;D;D;D;D ;J

MAVERICK [17]3 years ago
4 0

Answer:  TRUE

Explanation:  Transition elements are those which have electrons in the d orbitals in their outermost valence shell. They are also known as d block elements.

Thus Copper, Iron, Nickel etc are d block elements because their electrons are in the d orbital as shown-

Copper (Cu) = [Ar] 3d10 4s1

Iron (Fe) = [Ar] 3d6 4s2

Nickel (Ni) = [Ar] 3d8 4s2

Thus as shown in the electronic configuration above, the given stateent is true.

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Please help!! ASAP, thanks
bogdanovich [222]

Answer:

Mass of Cr = 0.25376 gram

Moles of Fe = 0.0011875

Mass of Te = 0.05472 gram

Moles of Ti = 7.9764

Explanation:

Given:

Elements     Moles      Mass

Cr               0.00488

Fe                                66.5 mg = 0.0665

Ti                 48

Hg                                1.60 kg = 1600

Computation:

Mass = Atomic mass x moles

Moles = Mass / Atomic mass

Atomic mass

Cr = 52 u        

Fe = 56 u                        

Te = 127.6 u  

Hg = 200.59 u

Mass of Cr = 0.00488 x 52

Mass of Cr = 0.25376 gram

Moles of Fe = 0.0665 / 56

Moles of Fe = 0.0011875

Mass of Te = 1.14 x 10⁻³ x 48

Mass of Te = 0.05472 gram

Moles of Ti = 1600 / 200.59

Moles of Ti = 7.9764

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3 years ago
How many moles are there in 40g of calcium
drek231 [11]
40 grams ÷ 40.08 grams/moles = 1 mole
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Answer:

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Explanation:

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The correct is this because they said
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